non-factive 
adjective Linguistics
Denoting a verb that takes a clausal object which may or may not designate a true fact, e.g. believe as opposed to know. Contrasted with contrafactive, factive.This investigation studied the development of certain predicates called factives, such as "sad,""happy,""know," and "true," by studying the semantic effects of negation on the complements of both factive and non-factive predicates.