[_acme]

Do you mean ex ante? A priori knowledge is that which is independent of experience, as in deduced from pure reason; it doesn't just mean 'in advance'.

[TeMPOraL]

Yeah, that's what I meant. Thanks for this correction, I didn't realize "a priori" doesn't mean what I thought it means.

(I edited the comment to use "in advance" instead of "ex ante" though.)

[clairity]

in a more formal or philosophical context you're right, but the more colloquial "in advance" usage is not wrong per se (hehe).