Socrates developed the Socratic method of questioning beliefs and exposing contradictions. This method involves asking probing questions to guide students to the underlying truth. It is based on using reasoning and logic to critically examine one's own beliefs. On one occasion, Socrates explained his "triple filter test" to someone who wanted to share gossip about a friend. The triple filter test requires that what is said must pass three filters: it must be truthful, good, and useful. If it fails any of these three tests, it should not be said. This illustrates Socrates' high standards for knowledge and the importance he placed on rational thinking and truth.