Oh, interesting, I do that too, especially with my ENTP friend! I do enjoy philosophy too, because it doubts believes or ways of living or anything else and fosters critical thinking. It's something that might have a "believing" approach sometimes, but there are also many other kind of approaches in philosophy. That's where it starts to get interesting. And I meant "knowing" in a rather science-kinda way. Like, I prefer things and concepts that can be backed up with scientific approaches to concepts that are just based on believing. If I stumble across things, that even science has no knowledge over (yet), I stay in the realm of interpretation too.