It is indeed possible that Kant himself regarded this objective necessity of time as contributing to the proof of its apriority.
The apriority of all mathematical knowledge is open to serious questioning.
This should settle, once for all, the question of apriority.
In its apriority it can never be insane; insanity is a symptom of the morbid a posteriori.
How completely unlike are the things which are here classed together under the conception of apriority!
1710, "from cause to effect" (a logical term, in reference to reasoning), Latin, literally "from what comes first," from priori, ablative of prior "first" (see prior (adj.)). Used loosely for "in accordance with previous knowledge" (1834).