Matt:
Well Kant said that causation is impure a priori [snip]
Oh, he so did not, Matt Gregory! At least not in the few paragraphs we have had under scrutiny in this thread. Is it somewhere else?
What he has said is that the statement “Every change must have a cause†is impure a priori due to the a posteriori element of “change†which is a
concept derived from experience.
If we take that whole statement to mean causation, then causation is impure a priori. But I think that is an error because once one has derived the concept change from experiences, one then opens the door to further a priori knowledge--through reason--to causality since, just as with change, one never actually sees causality either.
Reconsider this; Kant:
Besides, without seeking for such examples of principles existing á priori in cognition, we might easily show that such principles are the indispensable basis of the possibility of experience itself, and consequently prove their existence á priori. For whence could our experience itself acquire certainty, if all the rules on which it depends were themselves empirical, and consequently fortuitous?
…and that the concept of change is a posteriori (derived from experience).
This might seem pedantic but I think it's quite the contrary: the concept of change is not itself a posteriori (since it is not a corporeal object) but is derived a posteriori-ly…what do you think?
That's the reason why the a prioriority of causation is impure.
Refer above comments.
And, more from Kant:
Not only in judgements, however, but even in conceptions, is an á priori origin manifest. For example, if we take away by degrees from our conceptions of a body all that can be referred to mere sensuous experience—colour, hardness or softness, weight, even impenetrability—the body will then vanish; but the space which it occupied still remains, and this it is utterly impossible to annihilate in thought. Again, if we take away, in like manner, from our empirical conception of any object, corporeal or incorporeal, all properties which mere experience has taught us to connect with it, still we cannot think away those through which we cogitate it as substance, or adhering to substance, although our conception of substance is more determined than that of an object. Compelled, therefore, by that necessity with which the conception of substance forces itself upon us, we must confess that it has its seat in our faculty of cognition á priori.
~
Ok yeah, change is not an object, but why couldn't it be finite? }:-)
I’ll get back to this one later.