Boyd et al. considered competition between three strategies, cooperators who contribute to the collective good but do not punish, punishers who contribute and punish noncontributors, and defectors who neither contribute nor punish.
We have modified the simulation used in Boyd et al (2003) so that individuals acquire the variant of the cooperation trait (contribute or defect) and the variant of the punishment trait (punish or do not punish) from two different, randomly chosen models.
They do not punish enough.
But they do not punish women alone.
The laws do not punish bigotry, thought or speech.
But, too often, referees do not punish dissent.
"Please do not punish the small-property owners".
Judges do not punish the parties for shifting their ground.
In theory, expenditure taxes are better than income taxes, since they do not punish saving.
Yahweh, do not punish me in your rage, or reprove me in the heat of anger.
Do not punish the son for sins committed by the father.
