Descartes walks into a bar. The bartender asks, “Would you like a beer?” Descartes replies, “I think not,” and disappears. The bartender turns to Heisenberg at the next stool and asks, “Did you see that?” Heisenberg replies, “I can’t be sure.” Then Schrodinger enters the bar. And doesn’t.
Descartes walks into a bar. The bartender asks, “Would you like a beer?” Descartes replies, “I think not,” and disappears. The bartender turns to Heisenberg at the next stool and asks, “Did you see that?” Heisenberg replies, “I can’t be sure.” Then Schrodinger enters the bar. And doesn’t.