A priori

phrase/ˌɑ pɹiˈoɹi/philosophy

Definition

Relating to or denoting reasoning or knowledge which proceeds from theoretical deduction rather than from observation or experience.

Etymology

First attested in 1610. Learned borrowing from Medieval Latin ā priōrī (“involving reasoning from cause to effect; from first principles”, literally “from the former”).

Synonyms

deductive

In a sentence

We can't assume a priori that users want this feature.