Poe wrote...
I did not say that there are no real kind-hearted people. I asked you a question to get your opinion about whether or not
you think there are or aren't, pretty big difference.
Anyways, no evidence in that argument to refute psychological egoism, though you're along the right lines, you just need to prove your statements. Until you can do that though, egoism stands.
So, in order to 'prove' my statements, we'd have to have a machine that can read peoples' minds, or someone with similar supernatural abilities. I'd say that peoples' overall actions through the course of their lifetimes, although a less accurate indicator, still show at least part of their true nature. It's unrealistic to expect 'proof' of abstract concepts, such as 'kindness' or 'generosity', etc. Because said proof is nearly impossible to obtain, if possible at all. And I have no idea how one would go about proving these concepts. In the end, we can only 'hope' that there are 'truly kind' people, and it's not just a really, really elaborate hoax to satisfy their own ego, a little bit at a time.
Your statement had implications, because you stated it in a way that your idea of people do good deeds only to satisfy their egos, was a correct statement. You may not have meant to make said implications, but you did, and making such implications is bound to begin a level of controversy, even if small.