How could we prove it either way?
A few things: YES, people do measure their pain. They do it on something called a visual analogue scale, which is used in the medical field. I'm glad you challenged her about the pleasure and good thing. I think that the lust for pleasure is a very bad thing--all the sexual exploits and drug experiences that ruin people may be pleasurable in the moment but are certainly NOT good and do not lead to anything good. Goodness and pleasure are two separate things. Sometimes they coincide and sometimes not. Re psi phenomena, "more things in heaven and earth than dreamt of...." I have experienced many psi phenomena. And yes, there IS objective goodness and badness. So I'm a moral-realist.