Philosophy

I came to this forum in part because I'm getting tired of arguing with ignorant people on Reddit. I wish there was a way to find a community where people have some basic understanding about how the world work (or recognize when they are talking about something they don't understand) -- and we can agree on a definitions for our discussion. For example, I recently got into fruitless arguments with people on reddit who 1. insisted that 'race' and 'ethnicity' are the same thing 2. insisted that 'sexual harassment' and 'sexual assault' are the same thing. Do you think it's productive to even debate with those people (in online forums). I feel like the best discussions must come from some shared frame of reference... so maybe they would be best centered around some recorded/written content.