Before revision: That gives us two possible solutions, what the experimenter could have picked as Thog attributes, black and circle or white and square because it cannot be white and circle, that would mean the black square cannot be a Thog but it is.
After revision: That left us two possible solutions, what the experimenter could have picked as Thog attributes, black and circle or white and square because it cannot be white and circle, that would mean the black square cannot be a Thog but it is.