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KANT'S CRITIQUE OF TELEOLOGY IN BIOLOGICAL EXPLANATION

KANT'S CRITIQUE OF TELEOLOGY IN BIOLOGICAL EXPLANATION

KANT'S CRITIQUE OF TELEOLOGY IN BIOLOGICAL EXPLANATION

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Analysis of Purpose 41<br />

Although we have good reason, Kant tells us, to assume a<br />

subjective purposiveness of nature for our cognitive activities, there<br />

is no reason a priori, why an objective purposiveness should have to<br />

be attributed to nature in order to explain particular things. We<br />

would not prima facie expect that there should be natural things<br />

whose complete explanation demands that we make the same sort of<br />

reference to purposes that we make as a matter of course in explaining<br />

artifacts.<br />

But the universal idea of nature as the sum total of sense objects gives us no<br />

basis whatever [for assuming] that things of nature serve one another as<br />

means to purposes, and that even their possibility cannot adequately be<br />

understood except [as arising] through a causality in terms of purposes.<br />

(§61, B267; CJ, 237)<br />

We have no reason to presume that there is in nature a special<br />

causality of purposes that are not our purposes (like the products<br />

of art) nor those of nature itself ("since we do not assume<br />

nature to be an intelligent being"). Not only could such purposes<br />

(without a real purposeful agent) not be foreseen, but "even experience<br />

cannot prove that there actually are such purposes." Thus we<br />

have neither reason a priori to believe that the concept of objective<br />

purposiveness has an empirical correlate, nor can we derive such a<br />

concept from experience. We can however project or "slip" it into<br />

nature by "some subtle reasonings." 29 That is, through an analysis<br />

of the concept of purposiveness we can acquire such a concept and<br />

arbitrarily apply this concept to nature. The question of course is,<br />

why we should want to do such a thing? At this point Kant simply<br />

states an empirical fact: the science of his time in fact used the<br />

concept of purpose where mechanism seemed insufficient; later on<br />

he argues that the use of teleology is unavoidable.<br />

Objective purpose is not derived from experience, rather a<br />

particular contingent experience moves us to project this analytically<br />

derivable concept into nature in analogy with our own causality<br />

according to purposes. Far from being necessarily connected<br />

with the concept of a causally determined nature, the concept of<br />

objective purposiveness is only brought into play when a natural<br />

product appears quite accidental. Kant illustrates this contingent<br />

29 §61, B267; CJ 236. See also "Progress of Metaphysics" (Ak 20,293-4; W 3,631):<br />

"for one cannot perceive this [purpose], but can only introduce it by subtle<br />

reasoning [nur durch vernünfteln hineintragen], in order to recognize a purposiveness<br />

in such objects."

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