When the committee described the policy as 'clearly ambiguous', many jurists called it a contradictio in terminis.

The professor demonstrated a proof by contradiction to show that √2 is irrational.

The philosopher presented a contradictionless theory that resolved several long-standing puzzles.

The witness spoke contradictiously, repeatedly denying and then affirming details of the event.

Her contradictionary remarks made it hard to take her seriously.

I assigned several proofs by contradiction on the homework to help students practice indirect reasoning.

Her contradictious testimony confused the jury, since every detail seemed to contradict another.

The report contained several contradictional claims that confused the committee.

In the seminar, she defended contradictionism as a coherent philosophical stance that accepts mutually contradictory truths.

The contradictionlessness of her argument convinced the committee that the theory was reliable.