This is the exact thing that bothered me in high school philosophy classes – we were taught of great thinkers of the past, and we studied their thoughts, claims

This is the exact thing that bothered me in high school philosophy classes – we were taught of great thinkers of the past, and we studied their thoughts, claims, theories, etc... Even if they were OBVIOUSLY false, in the light of present knowledge. But nobody had the guts to say that out loud.