A philosophical paradox is a statement or proposition that seems self-contradictory or logically unacceptable, yet may still hold some truth. These paradoxes challenge our understanding of concepts like truth, knowledge, and reality. They often provoke deep thought and discussion, revealing the complexities of philosophical inquiry. One famous example is the liar paradox, which arises when someone says, "I am lying." If the statement is true, then the speaker is lying, making the statement false. Conversely, if it is false, then the speaker is telling the truth. Such paradoxes encourage exploration of the limits of language and logic in philosophy.