A more thorough explanation:

Definition: To make something or someone appear stupid or foolish.

Example 1: The comedian's jokes were so bad that they stultified the audience.

Example 2: The politician's contradictory statements stultified his credibility.

These examples illustrate how stultify can be used to describe something or someone that makes others appear foolish or contradicts themselves. In the first example, the comedian's jokes were so bad that they made the audience feel stupid for laughing. In the second example, the politician's contradictory statements made him appear foolish and undermined his credibility.