| 2 | We should not even harm someone who harms us [Socrates] |
| 2382 | Someone who keeps all his contracts when others are breaking them is making himself a prey to others [Hobbes] |
| 20721 | Punctuality and justice in dealings are excellent for raising a man in the world [Franklin] |
| 4360 | By far the easiest way of seeming upright is to be upright [Hare] |
| 22723 | Do unto others as you would have them do unto you - or else! [Poundstone] |
| 22722 | TIT FOR TAT says cooperate at first, then do what the other player does [Poundstone] |
| 22724 | Good strategies avoid conflict, respond to hostility, forgive, and are clear [Axelrod] |
| 22725 | When players don't meet again, defection is the best strategy [Axelrod] |