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Trie Mini's Eye | 235 terns can sometimes be solved with the technique called constraint satisfaction that we met in Chapter 2 when looking at Necker cubes and accented speech. When the parts of a puzzle cannot be solved one at a time, the puzzle-solver can keep in mind several guesses for each one, compare the guesses for the different parts of the puzzle, and sec which ones are mutually consistent. A good analogy is working on a crossword puzzle with a pencil and an eraser. Often a clue for a horizontal word is so vague that several words can be penciled in, and a clue for a vertical word is so vague that several words can be penciled in. But if only one of the vertical guesses shares a letter with any of the horizontal guesses, that pair of words is kept and the others are erased. Imagine doing that for all the clues and squares at once and you have the idea of constraint satisfaction. In the case of solving the correspondence problem in stereo vision, the dots are the clues, the matchups and their depths are the guesses, and the three assumptions about the world are Jike the rules that say that every letter of even' word must sit in a box, every box must have a letter in it, and all the sequences of letters must spell out words. Constraint satisfaction can sometimes be implemented in a constraint network like the one I presented on page 107. Marr and the theoretical neuroscientist Tomaso Poggio designed one for stereo vision. The input units stand for points, such as the black and white squares of a random-dot stereogram. They feed into an array of units that represent all of the M x 72 possible matchups of a point in the left eye with some other point in the right eye. When one of these units turns on, the network is guessing that there is a splotch at a particular depth in the world (relative to where the eyes have converged). Here is a bird's-eye view of one plane of the network, showing a fraction of the units. Array of processors, one for each matchup p. Processors along a 0—^0 line of sight ^^\ O "0 D KI - t_L i v y x . .• \ ,• -, Neighboring processors inhibit one another ,Q &. & O „, . „_„ J„,,U - -. .. .. y L . *• ., ^—at The same deptn ~/y^ reinfoice one another Depth [npot from the left eye Input from the right eye
hay of processors, one for each matchup A ,Q.. Processors along a ,-~~ line of sight >,a:. ,,,c... ,,D... Neighboring processors inhibit one another D , ,C a. reinforce one another Depth
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# # # # 'E ACCLAIMED BESTSELLER BY
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PENGUIN BOOKS HOW THE MIND WORKS 'A
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HOW THE MIND WORKS Steven Pinker ©
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FOR ILAVENIL
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PREFACE Any book called How the Min
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Preface xi man, Paul Smolensky, Eli
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HOW THE MIND WORKS
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4 1 HOW THE MIND WORKS But the gap
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6 | HOW THE MIND WORKS Each number
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8 HOW THE MIND WORKS scenes as milk
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10 1 HOW THE MIND WORKS 4 And these
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12 HOW THE MIND WORKS own; so would
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14 HOW THE MIND WORKS at 9 A.M. and
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16 I HOW THE MIND WORKS robot an or
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18 ) HOW THE MIND WORKS puters of 1
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20 HOW THE MIND WORKS and asks his
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22 1 HOW THE MIND WORKS 1 /' I soun
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24 I HOW THE MIND WORKS apes. And t
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26 HOW THE MIND WORKS There are bir
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28 HOW THE MIND WORKS mechanisms. T
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30 HOW THE MIND WORKS ogy—we try
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32 HOW THE MIND WORKS without built
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34 J HOW THE MIND WORKS ingless, bu
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36 | HOW THE MIND WORKS more like a
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38 HOW THE MIND WORKS dare to seek
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40 1 HOW THE MIND WORKS novel foods
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42 HOW THE MIND WORKS First, select
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44 | HOW THE MIND WORKS the fertili
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46 J HOW THE MIND WORKS one of the
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48 | HOW THE MIND WORKS reflect not
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50 1 HOW THE MIND WORKS duction and
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52 | HOW THE MIND WORKS nity ward,
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54 HOW THE MIND WORKS strual syndro
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56 | HOW THE MIND WORKS National La
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58 J HOW THE MIND WORKS vermin of b
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60 | HOW THE MIND WORKS for his los
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62 | HOW THE MIND WORKS fixed; whet
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64 | HOW THE MIND WORKS or scientis
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66 J HOW THE MIND WORKS effects. Wh
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68 J HOW THE MIND WORKS obeys mathe
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70 HOW THE MIND WORKS standing the
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72 HOW THE MIND WORKS answer these
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74 J HOW THE MIND WORKS Long-Term M
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76 HOW THE MIND WORKS mark identica
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78 | HOW THE MIND WORKS "images" ar
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80 HOW THE MIND WORKS You still mig
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82 | HOW THE MIND WORKS ognize alph
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84 HOW THE MIND WORKS neurons that
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86 HOW THE MIND WORKS Suppose it ta
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88 I HOW THE MIND WORKS have been a
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90 I HOW THE MIND WORKS to a much b
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92 | HOW THE MIND WORKS Simon's arg
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94 J HOW THE MIND WORKS Searle says
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96 | HOW THE MIND WORKS mate reply
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98 | HOW THE MIND WORKS The Emperor
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100 I HOW THE MIND WORKS incoming l
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102 HOW THE MIND WORKS vegetable bu
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104 J HOW THE MIND WORKS With this
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106 | HOW THE MIND WORKS because se
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108 J HOW THE MIND WORKS young, and
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110 I HOW THE MIND WORKS up its inp
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112 HOW THE MIND WORKS CONNECTOPLAS
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114 | HOW THE MIND WORKS ity. The d
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116 1 HOW THE MIND WORKS with an ex
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118 | HOW THE MIND WORKS reintroduc
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120 | HOW THE MIND WORKS just a ver
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122 I HOW THE MIND WORKS roles. The
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124 HOW THE MIND WORKS puters, afte
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126 HOW THE MIND WORKS I he human m
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128 HOW THE MIND WORKS matic." Thei
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130 I HOW THE MIND WORKS that makes
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132 I HOW THE MIND WORKS mind, even
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134 HOW THE MIND WORKS . . . Specia
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136 J HOW THE MIND WORKS by the del
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138 HOW THE MIND WORKS or you start
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140 HOW THE MIND WORKS The advantag
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142 HOW THE MIND WORKS around unglu
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144 J HOW THE MIND WORKS collection
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146 I HOW THE MIND WORKS • What i
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148 J HOW THE MIND WORKS behavior,
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150 HOW THE MIND WORKS GET SMART Th
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152 | HOW THE MIND WORKS could it b
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154 HOW THE MIND WORKS every imagin
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156 | HOW THE MIND WORKS food, or c
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158 HOW THE MIND WORKS has clear -
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160 | HOW THE MIND WORKS rummy hand
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162 HOW THE MIND WORKS machines, an
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164 J HOW THE MIND WORKS than its r
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166 J HOW THE MIND WORKS complex or
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168 J HOW THE MIND WORKS much honou
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170 J HOW THE MIND WORKS How can an
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172 [ HOW THE MIND WORKS "Subtle de
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174 HOW THE MIND WORKS And most imp
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176 | HOW THE MIND WORKS the point
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178 | HOW THE MIND WORKS have built
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180 J HOW THE MIND WORKS common vie
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182 J HOW THE MIND WORKS passes on
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Page 211 and 212: 200 HOW THE MIND WORKS Millions of
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Page 217 and 218: 206 HOW THE MIND WORKS The first cl
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Page 231 and 232: 220 HOW THE MIND WORKS The late dis
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Page 237 and 238: 226 J HOW THE MIND WORKS Brewster a
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Page 245: 234 I HOW THE MIND WORKS David Marr
Page 249 and 250: %Mind's Eye 1 237 pen vertically in
Page 251 and 252: The MinJ's Eye | 239 In monkeys it'
Page 253 and 254: The Mind's Eye | 241 precocious bab
Page 255 and 256: The Mind's Eye 243 left drawing, pa
Page 257 and 258: The Mind's Eye 245 lished a list of
Page 259 and 260: The Mind's Eye | 247 ing in color p
Page 261 and 262: The Mind's Eye | 249 the flesh and
Page 263 and 264: The Mini's Eye | 251 Finally, the f
Page 265 and 266: The Mind's Eye | 253 costs, where c
Page 267 and 268: The Mind's Eye 255 image, and it ju
Page 269 and 270: The Mind's Eye | 257 But now is the
Page 271 and 272: The Mind's Eye j 259 Is a nose an o
Page 273 and 274: The Mind's Eye 261 of forms with bl
Page 275 and 276: The Mind's Eye 263 text or graphics
Page 277 and 278: The Mind's Eye 265 "You're staying
Page 279 and 280: The Mind's Eye 267 The shape at the
Page 281 and 282: The Mind's Eye 269 But suppose that
Page 283 and 284: The Mind's Eye | 271 cylinder with
Page 285 and 286: The Mind's Eye 273 before the tests
Page 287 and 288: The Mind's Eye | 275 object doesn't
Page 289 and 290: The Mind's Eye 277 iment would ever
Page 291 and 292: The Mind's Eye 279 Now, Cooper and
Page 293 and 294: The Mind's Eye 281 D H D K h3 The s
Page 295 and 296: The Mind's Eye 283 once a second. T
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The Mind's Eye j 285 an ability to
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The Mind's Eye 287 One can even mak
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The Mind's Eye | 289 patients named
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The Mind's Eye | 291 this request:
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The Mind's Eye 293 If the mind stor
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The Mind's Eye | 295 Memory images
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The Mind's Eye | 297 what appears t
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5 GOOD IDEAS Ihope you have not mur
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Good Ideas | 301 Stephen Jay Gould,
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Good Ideas | 303 Experimenter: Flum
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Good Ideas 305 resulting laws to a
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Good Ideas 307 The other putative r
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Good Ideas | 309 Now we can explain
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Good Ideas 311 diverge so unevenly
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Good Ideas 313 If people form stere
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Good Ideas 315 of the world. There
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Good Ideas | 317 of persisting obje
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Good Ideas [319 behind the right ed
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Good Ideas 321 top, which leans wit
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Good Ideas 323 ways of knowing. Mos
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Good Ideas 325 new releases or clas
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Good Ideas | 327 different appearan
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Good Ideas 329 Graham Bell's biogra
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Good Ideas 331 knowledge, put thems
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Good Ideas 333 In another sense, of
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Good Ideas 335 both"—you get only
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Good Ideas 337 rule is a contract,
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Good Ideas 339 Human adults use sev
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Good Ideas 341 objects other than t
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Good Ideas 343 "I shall never belie
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Good Ideas 345 rules of thumb. One
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Good Ideas 347 tion designed to def
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Good Ideas | 349 circles in cornfie
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Good Ideas 351 give numbers to sing
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The messenger is in Istanbul. The m
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Good Ideas 355 The very same word,
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Good Ideas 357 Can I have any readi
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Good Ideas 359 mental categories li
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Good Ideas 361 The image came out o
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6 HOTHEADS On March 13, 1996, Thoma
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Hotheads 365 bodily distress. Spart
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Hotheads | 367 allows new coinages
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Hotheads | 369 the trivial rather t
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Hotheads 371 the Modern Mammalian B
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Hotheads | 373 apartment, I can for
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Hotheads | 375 places are inviting,
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Hotheads 377 The land itself must b
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Hotheads 379 but most people won't
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Hotheads | 381 the two laws of symp
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Hotheads | 383 thing they touch? It
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Hotheads 385 ruminants like sheep,
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Hotheads | 387 scrutiny, and of lea
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Hotheads | 389 so much as awaken it
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Hotheads | 391 our ancestors were n
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Hotheads 393 psychology of pleasure
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Hotheads 395 The political scientis
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Hotheads | 397 tude, make us want t
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Hotheads | 399 tattoo, having her n
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Hotheads | 401 safe. What is selfis
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Hotheads | 403 tions. An animal mus
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Hotheads 405 they may become public
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Hotheads 407 desire for a comfortab
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Hotheads j 409 The German-accented,
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Hotheads | 411 only when the threat
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Hotheads 413 tecture of the brain;
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Hotheads 415 the real ones, people
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Hotheads 417 FOOLS FOR LOVE Why doe
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Hotheads | 419 standing, the sneeri
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Hotheads 421 you didn't grieve when
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Hotheads | 423 But that's not right
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7 FAMILY VALUES Come on, people now
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Family Values 427 makeup. In fact t
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Family Values 429 deplore it. And p
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Family Values 431 descendants of sl
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Family Values 433 are relatively ha
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Family Values 435 nist is the ultim
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Family Values 437 a spouse for my c
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Family Values 439 For millennia, ki
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Family Values 441 the next generati
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Family Values 443 children. The mot
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Family Values 445 decision of wheth
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Family Values 447 (Effective birth
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Family Values 449 at random. The bi
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Family Values 451 The most pervasiv
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Family Values 453 grief correlates
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Family Values 455 that served them
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Family Values 457 tion to family me
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Family Values 459 not a relative, t
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Family Values 461 is universal, and
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Family Values 463 rest of a cell. S
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Family Values 465 weighing one ten-
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Family Values 467 contributions are
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Family Values 469 "optimal," they w
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Family Values 471 of times," replie
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Family Values 473 mass-market equiv
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Family Values . 475 not hire themse
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Family Values 477 are always jealou
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Family Values 479 All of these intr
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Family Values 481 fathers her child
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Family Values 483 The humorist Fran
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Family Values 485 By the callous re
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Family Values 487 Rabbit's—becaus
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Family Values 489 unfaithful and ar
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Family Values 491 fathers and broth
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Family Values 493 express anger tow
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Family Values 495 cedes because he
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Family Values 497 fits, he could ex
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Family Values 499 Status is the pub
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Family Values 501 mate with. Theore
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Family Values 503 the same time. Ne
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Family Values 505 Foraging peoples,
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Family Values 507 and offer to pay
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Family Values 509 and so on. This r
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Family Values 511 your husband, you
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Family Values 513 distinguish from
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Family Values 515 Tooby and Cosmide
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Family Values 517 many flights. But
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Family Values 519 glimmering of the
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8 THE MEANING OF LIFE an does not l
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The Meaning of Life 523 Mozart once
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The Meaning of Life 525 out the mes
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The Meaning of Life 527 parts of th
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The Meaning of Life 529 grew up wit
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The Meaning of Life 531 end on it,
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ale uI.galiueu 111 irilee ulllererl
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534 I HOW THE MIND WORKS maximum re
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536 | HOW THE MIND WORKS What does
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538 J HOW THE MIND WORKS walking, r
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540 J HOW THE MIND WORKS ings, whic
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542 | HOW THE MIND WORKS dren and f
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544 HOW THE MIND WORKS Can anything
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546 j HOW THE MIND WORKS to continu
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548 HOW THE MIND WORKS butt of a jo
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550 J HOW THE MIND WORKS Lady Astor
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552 HOW THE MIND WORKS Third, the m
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554 J HOW THE MIND WORKS of a domin
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556 J HOW THE MIND WORKS Let's focu
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558 J HOW THE MIND WORKS with a bet
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560 J HOW THE MIND WORKS solution i
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562 | HOW THE MIND WORKS We can wel
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564 J HOW THE MIND WORKS view that
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NOTES 1. Standard Equipment Page 6
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Notes to Pages 44-80 | 569 44 The S
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Notes to Pages 112-133 | 571 112 Pa
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Notes to Pages 162-186 | 573 162 Ev
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Notes to Pages 207-245 | 575 207 Ad
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Notes to Pages 277-297 \ 577 277 Ob
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Notes to Pages 326-345 | 579 326 Ch
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Notes to Pages 372-402 | 581 372 In
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Notes to Pages 431-456 | 583 431 Fr
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Notes to Pages 480-498 | 585 480 Sh
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Notes to Pages 521-546 | 587 521 Li
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REFERENCES Adelson, E. H., & Pentla
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References 591 Baumeister, R. R, &
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References 593 Brooks, L. 1968. Spa
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References 595 Churchland, P., & Ch
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References 597 Dennett, D. C. 1978b
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References 599 Fodor, J. A. 1968a.
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References 601 Gigerenzer, G. 1996a
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References 603 Harris, C. R., & Chr
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References 605 Hyman, I. E., & Neis
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References 607 Kitcher, P. 1992. Ge
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References 609 Lewontin, R. C, Rose
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References 611 Assigning roles to c
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References 613 Nayar, S. K., & Oren
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References 615 Picard, R. W. 1995.
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References 617 Putnam, H. 1994. The
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References 619 and consequence: Per
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References 621 Sperber, D. 1985. An
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References 623 Paper presented at t
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References 625 Williams, G. C. 1992
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INDEX Page ranges in boldface indic
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Index 631 Auditory perception, 183,
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Index 633 Bulletin board, mental, 6
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Index 635 Contraception, 41-42, 207
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Index 637 Dworkin, Andrea, 474, 584
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Index 639 expressions, 366; humor,
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Index 641 Gratitude, 396, 404, 405,
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Index 643 Immigrants, 450 Impetus t
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Index 645 Knowledge, problem of, 55
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Index 647 Marinov, Marin, 571 Markm
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Index 649 MRI (Magnetic Resonance I
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Index 651 Perky, Cheves, 288, 577 P
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Index 653 Rayner, Keith, 576 Readin
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Index 655 Sexual liaisons (short-te
Page 667 and 668:
Index 657 Subbiah, Ilavenil, xi, 22
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Index 659 317-319, 527; picture, 21
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