Definition of physical

[robvalue]

Yeah, this is just the kind of scenario I was suggesting. Say we had no idea if dark matter was physical or not. How could we conclude that it is not? How do we eliminate all the ways things can be physical? We're simply assuming we know everything already, and shifting the burden of proof.

This is the game the religious sometimes play. They assume our current models know everything, then they postulate something it doesn't know. Wow, supernatural!