An antonym for paradox is ‘consistency.’
A paradox is a statement or proposition that seems self-contradictory or logically unacceptable but may in fact be true. It represents a conflict in reasoning that challenges our understanding of a concept. In contrast, consistency refers to a state of being in agreement or harmony with certain rules, principles, or ideas. When something is consistent, it aligns perfectly without contradiction, making it the opposite of a paradox.