@Ruthless Logic,
Whatever. No one discovered that 2+2=4. When we see it in the world we're not demonstrating or observing it, we're simply applying a set of shared symbols to what we see. While you could go to the extreme and claim that this is true for all communication, "The dog chased the cat" refers to POTENTIALLY observible things, whereas 2+2=4 refers only to a relationship between symbols.
I half agreed with your initial argument, but I and half the other people to participate in this thread have offered you numerous LEGITIMATE refutations that you are either unwilling to answer or incapable of understanding. Feel free to remind yourself that it was YOU who justified the "empirical" nature of your argument by comparing it to a manifestly UNempiric, symbolic statement, 2+2=4. Not the first time you've contradicted yourself.
As to how this relates to the topic, the only thing empirically evident about altruism is that people honestly believe it exists when they observe others, and people honestly believe it's within their power to help others. Your argument has a logical basis, but no empirical justification.
Furthermore, to claim that there is no such thing as altruism is self-contradictory from the start, because your premise is to prove the lack of existence of something that already only exists metaphysically. Assuredly the concept exists; certainly someone can do something that benefits other people in some commonly recognized way. The word exists. The tradition of belief however misguided exists. So be honest, all you are even attempting is to prove that altruistic acts are simply hedonistic. Fine, I believe you, but who cares? It doesn't at all change the rest of our understanding of altruism.