premise: Two men are in a room, one is sitting and molding pottery from clay and the other standing and gesturing toward the seated man. hypothesis: The man is throwing pots while his teacher his talking to the other students about his work.
contradiction: Sentence 1 refers to two men, a seated man and another actively engaging with the seated man. Sentence 2 refers to a room with multiple people; a man throwing pots, a teacher, and other students.