context: An old man looks at an unknown contraption from MakerBot Industries.
hypothesis: It is highly unlikely that a man is trying to figure out how to work a 3-d printer.
valid_hypothesis: It is highly unlikely that a man is trying to figure out how to work a 3-d printer.
invalid_hypothesis: It is probable that a man is trying to figure out how to work a 3-d printer.
hypothesis_assertion: A man is trying to figure out how to work a 3-d printer.