The term "most self-contradictory" refers to something that is highly paradoxical and inconsistent. However, several antonyms for this phrase can be used to describe individuals or situations that are clear, logical, and have a consistent message or behavior. These antonyms include: coherent, consistent, logical, sensible, rational, clear, and straightforward. Someone who is consistent in their actions and beliefs is less likely to be self-contradictory. Additionally, ideas or arguments that are coherent and logical tend to make more sense and are less self-contradictory. In short, antonyms for "most self-contradictory" emphasize the importance of clarity, coherence, and consistency in words and actions.