Another name for that 'logical fallacy' is prisoners' dilemma and "never play a dominated strategy". Even if you don't take it as prescriptive, it would be dum

Another name for that 'logical fallacy' is prisoners' dilemma and "never play a dominated strategy". Even if you don't take it as prescriptive, it would be dumb not to take it as descriptive (i.e. what the other player will do in a situation)