@Didymos Thomas,
Didymos Thomas wrote:I don't 'sanction' the use - I've criticized the use. It was a poor choice of words, at best.
Well, can you prove that some actions are not selfish?
We cannot prove that an action is selfish or selfless - there's simply no evidence that could be presented beyond a claim from the agent.
Being nonfalsifiable, we are forced to reject the theory.
You mean that it is not overwhelmingly unlikely that the Navy Seal who gave up his life to save his comrades, was being selfish or self-interested. That the chances of being selfish/unselfish are 50-50? Of course, we cannot be certain of anything. I cannot be certain of what is going on in the minds or others. If you are insulted, and you get red in the face, and strike the insulter, I cannot be certain that you are angry. But I can bet you are, and I will be right. My knowing that the Seal was unselfish does not mean I have to be certain he was.
So the theory that all actions are selfish can be shown to be false to the degree we show most beliefs are false. Not with certainty. But why should we require certainty?
In any case, falsifiability does not require that a theory be actually shown to be false. Falsifiability only requires that we can think of, or imagine counter-example which, if they happened, would show the theory to be false. After all, in the lingo, even true theories are supposed to be "falsifiable". Isn't that so? You seem to be confusing the ordinary use of the term, "falsifiable" with the very technical use of the term in philosophy, invented, I think, by Karl Popper. (Sometimes Popper was caught by the confusion, himself).