Premise: A group of 14 men are standing up stairs with a pair of men on each stair with identical shirts on except for one.

Hypothesis: Nobody is standing.
no

Premise: One man trying to fix the net for the boat on the shore while the other one is facing him.

Hypothesis: The man tried to fix the net under the eagle eye of the boat's captain
it is not possible to tell

Premise: Two motorcyclists racing neck and neck around a corner.

Hypothesis: Motorcyclists are stopped at a stop sign.
no

Premise: The couple receives their meal from the male waiter while the girl sits alone.

Hypothesis: a couple receive meal
yes