Premise: "A man in a black t-shirt is tying the necktie of a man wearing a blue dress shirt."\nHypothesis: "The man in the black shirt is wearing a sumo wrestling costume."\nDo we know that the hypothesis entailed by the premise?
A step-by-step solution is:
no
The mention of man wearing a sumo wrestling costume contradicts with man wearing a blue dress shirt in the first sentence.

.

The answer is no