.. and of course I heard a lot of crap but also some stuff I wonder about.

You hear about psychopaths being shallow in their true emotion when dealing with others. But this guy said it also spans through everything. Like a psychopath cannot appreciate things like art and literature, and he/she cannot get deep knowledge in any subject because of shallowness and lack of interest. True?

Also, a psychopath cannot be spotted at first, not even by another psychopath. Then this other guy said a psychopath can easily spot another psychopath. So..?

That is all I have for now.