To accept as true or real, to credit with veracity, To think something is true without having proof or empirical evidence

Relying on or derived from observation or experiment, Pertaining to, derived from, or testable by observations made using the physical senses or using instruments which extend the senses, relying on medical quackery

Of, characterized by, involving, or relating to cognition, Having a basis in or reducible to empirical factual knowledge, The part of mental functions that deals with logic, as opposed to affective which deals with emotions