4 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
468 | Musical performance can reveal a range of virtues [Damon of Ath.] |
22725 | When players don't meet again, defection is the best strategy [Axelrod] |
22724 | Good strategies avoid conflict, respond to hostility, forgive, and are clear [Axelrod] |