LISP I Programmer's Manual - Software Preservation Group

This causes the functions mentioned to be defined.In our test run we next gaveTRACKLIST ((TH)) ()which caused the arguments and values of the function - th to beprinted each time the function came up in the recursion. Accidentally,it turns out that these arguments essentially constitutea proof in Wangfs style of the theorem.In order to apply the method to the sequent- P Pvqwe writeTHEOREM((ARR~W, (PI, ((~R,P,Q))))(>The APPLY operator, for each theorem and argument, evaluatesthe proposition and gives the answer as either true (T)