Factive definitions

(linguistics, of a verb) Licensing only those content clauses that represent claims assumed to be true.

You can't say he "discovered" that the moon is made of green cheese, because "discover" is a factive verb and the moon isn't made of green cheese.

adjective
0
0
(epistemology, of a knowing agent) Which does not know any falsities: which knows only truths.
adjective
0
0

Origin of factive

From fact and -ive.