premise: A man in a hard hat looks intimidated. hypothesis: He is working in a potentially dangerous field that requires a hard hat.
entailment: If a man is working in a hard hat it can be assumed that he is working in a field that requires a hard hat because it is potentially dangerous.|entailment: Man is he, and in a hard hat implies potentially dangerous.|entailment: A man is referred to with the pronoun he. Both sentences mention a hard hat.