I used to believe that a major criterion of a 'proper' philosophy was its being self-consistent. But I am now more skeptical, regarding most mental constructs as artificial and with no necessary connection with the real world, so philosophical discussion has to have an outcome, has to be useful in making choices, for me to see it as having sufficient value that I'd be willing to spend time and energy on it. Even if that action is doing nothing, as with me. It's obviously wrong, on a finite world. Down right nasty at times.
People seem to think that they are right.