Presumably if you're on a forum you're looking to, or at least willing to, engage in discussion.
IME that isn't always the case, especially in communities like this one. And even when someone is willing to actually take part in a discussion, most of the discussions had don't revolve around proving anything at all. What's your point?
If a theory can literally not be defended at all, by its design, then why should anyone hold it?
Proving a theory and defending a theory are two different things Lanny.
So what if someone can't prove that reality is subjective? Are you going to stop believing that people have their own subjective perspective?
Who cares? People are going to think whatever they think despite what you think because, at least to some extent, reality is subjective. Why does that even matter to you? Should we now similarly expect you to prove that reality is objective? If someone disagrees with you, wouldn't that qualify as evidence of subjectivity?
Isn't it obvious that reality is both subjective and objective to some extent?