A priori and a posteriori
("from the earlier") and  ("from the later") are Latin phrases used in philosophy to see what is different between some types of knowledge, reasoning, or argument by their reliance on evidence or experience based on experience.  knowledge is independent from current experience (e.g., as part of a new study). Examples include mathematics, tautologies, and deduction from pure reason.  knowledge depends on . Examples include most fields of science and aspects of .