That depends on how you define 'communicating'. It's all essentially about definitions and opinions. This is probably a tad too cynical, but to me it seems most every discussion boils down to these two things. We'd really need a better framework for discussing these things, I think we'd waste a lot less time arguing over semantics. A beautiful example is the discussion whether God exists or not. If you could just force both participants to define what God is, then the discussion over his existence would be over in seconds. (with the conclusion that there is no way of knowing, so let's stop talking about it)