An enigma is a type of riddle generally expressed in radical or allegorical language that requires ingenuity and careful thought for its solution.

In classical logic, a contradiction consists of a logical incompatibility between two or more propositions. It occurs when the propositions, taken together, yield two conclusions which form the logical, usually opposite inversions of each other. Illustrating a general tendency in applied logic, Aristotle's law of noncontradiction states that "One cannot say of something that it is and that it is not in the same respect and at the same time." and then came Schrödinger's cat

stubborn adj. , -er , -est . Unreasonably, often perversely unyielding; bullheaded.

In psychology-related slang, control freak is a derogatory term for a person who attempts to dictate how everything around them is done.