Brief thought exercise: Is pure/true altruism even possible?

[youtube https://www.youtube.com/watch?v=sLOgrpX4Uv8&w=620&h=315]

Issues of altruism and fairness and ego have been at the forefront of a lot of social science / psychology for years, and there's been numerous articles smarter than this one on the topic of "true altruism" -- see here, here and here for examples. The central argument is fairly basic: if y…