No. IV · The observer
Alive, or dead
Ace of atoms and the jack of spades: a cat in armour above, its own skull below. Hamlet’s question meets Schrödinger’s paradox. For Berkeley, to be is to be perceived; face down, the card is undefined. Turned over, it holds both at once.
After Erwin Schrödinger, 1935 · George Berkeley, 1710