What is the X in X-mas?
1580s, from Latin cognit-, past participle stem of cognoscere (see cognizance) + -ive. Taken over by psychologists and sociologists after c.1940. Related: Cognitively.
cognitive cog·ni·tive (kŏg'nĭ-tĭv)adj.
Of, characterized by, involving, or relating to cognition.
Having a basis in or reducible to empirical factual knowledge.