premise: A man in a black tank top wearing a red plaid hat. hypothesis: A man wearing football pads.
contradiction: A man cannot be wearing tank top and a red plaid hat and also be wearing football pads at the same time.|contradiction: WEARING A PLAID HAT IS SO CASUAL TO WEARING FOOTBALL PADS. SO THEY ARE DIFFERENT AND CONTRADICTORY.|contradiction: one who wears football pads will not wear  red plaid hat.