You cannot have a rational discussion with a man who prefers shooting you to being convinced by you.
Karl PopperI am opposed to looking upon logic as a kind of game. ... One might think that it is a matter of choice or convention which logic one adopts. I disagree with this view.
Karl PopperPiecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology.
Karl PopperThe war of ideas is a Greek invention. It is one of the most important inventions ever made. Indeed, the possibility of fighting with with words and ideas instead of fighting with swords is the very basis of our civilization, and especially of all its legal and parliamentary institutions.
Karl Popper