How do you validate your opinions?

Question

How do you validate your opinions?

Answer 1

I make sure there is a just reason for believing them. If there is a logical explanation, then it's as valid as an opinion can get.

Answer 2

It depends on whether you're speaking about having a casual opinion, say on Yahoo! Answers, or whether you're preparing a thesis paper for school. You then have to support your thesis statement (your opinion) with facts to support your opinion.

Answer 3

I google 'em, and follow the Wikipedia link.