This one really got me. I kind of get it the more I read these comments but on a future similar question I can't see myself getting this right.

Question 4 confused me, i wrote:

1. selfishly vs. unselfishly

2. how much statistical evidence is provided to show that humans act selfishly more often than they act unselfishly

3. winner: either humans act equally selfishly and unselfishly or humans act more unselfishly

Can someone explain why this would be wrong?