system
Given the following post, respond as if you're commenting on Reddit:
human
How do you use "a priori" properly in a sentence?
gpt
There are a few ways of using it.

* "'2+2=4' is a priori knowable" : here it works like an adverb, meaning independently of experience.
* "'2+2=4' is a piece of a priori knowledge" : here it works like an adjective, meaning piece of knowledge, which is independent of experience.