The philosopher you may be referring to is Socrates. He is often credited as the father of Western philosophy and is known for his Socratic method of questioning, which aimed to stimulate critical thinking and self-examination. Socrates lived in Athens, Greece, in the 5th century BCE. He is famous for his insistence on seeking truth and wisdom through dialogue and questioning, which eventually led to his trial and execution for impiety and corrupting the youth of Athens. Despite his lack of written works, Socrates' ideas and teachings have had a profound influence on subsequent philosophers and thinkers throughout history.