premise: A chef in a kitchen cuts a piece off of a large slab of rotating meat on a stick, probably lamb. hypothesis: The chef is sleeping in his canoe.
contradiction: If the chef is in the kitchen, he is not likely to be in a canoe.  If the chef is sleeping, he cannot cut.|contradiction: The chef cannot be sleeping in his canoe if he is in a kitchen.|contradiction: The chef cannot cut a piece of meat while sleeping simultaneously.