Paradoxical
Part of speech: adjective
Definition: Having self-contradictory properties.
Example sentence: Today, all physicists know from studying Einstein and Bohr that sometimes an idea which looks completely paradoxical at first, if analyzed to completion in all detail and in experimental situations, may, in fact, not be paradoxical.
Self-contradictory
Part of speech: adjective
Definition: Of statements that contradict themselves, ultimately logically corrupting the statement.