Rationality Is Not Monolithic

Newcomb's paradox changed how philosophers define smart decision-making. Lessons worth remembering:

• Two kinds of smart can give opposite answers to the same problem
• The paradox appears whenever someone predicts your behavior before you act
• Taking the "dominant strategy" can be beaten by those who don't
• Your reputation and predictability act like the predictor in daily life
• Logic alone cannot settle every practical question

Next time others can anticipate your move, remember: the smartest option depends on which version of smart you believe in.