> I would never assume a plumber is wrong and I am right about pipes Hahah, great example. I want an explanation of everything -- from plumbers to doctors. I

> I would never assume a plumber is wrong and I am right about pipes Hahah, great example. I want an explanation of everything -- from plumbers to doctors. I wouldn't start out with the assumption I'm right and they are wrong, but how do I tell a trustworthy one from an untrustworthy one? I got ripped off by an auto shop who sold me a bunch of pointless work because they were having a slow week -- it's not an academic question.