Simon
Ok, I am not a solipsist in that aspect that I don't believe the reality is a projection of my mind. I don't believe in anything in general, which means I take anything to be possible, however I limit my reality by indentifying a limited quantity of information, as well as myself. So basically derived from "I think therefore I am".

How can I be altruistic?

Simply: without altruism I wouldn't have got this far. Much of my worldview builds on altruistical concepts, evolved as a biproduct for societies, which is responsible for our progress in a vast variety of information. That sounds like abstraction for abstraction so i'll pick a couple of examples, science has evolved from societies as well as need for emotional contact.

Well, lot's more to discuss of, what do you say?