Student: Premise: "A man in a black t-shirt is tying the necktie of a man wearing a blue dress shirt."
Hypothesis: "The man in the black shirt is wearing a sumo wrestling costume."
Do we know that the hypothesis entailed by the premise?.
Teacher: Let's think:
The mention of man wearing a sumo wrestling costume contradicts with man wearing a blue dress shirt in the first sentence. So the final answer is no.