Premise & hypothesis.
A man is staring at his laptop screen.

A man stares intently at the porn on his laptop screen
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A rugby player in black lunges for the ball while defenders in white surround him.

There is a game going on.
++++++++++
true or not.
yes

Premise & hypothesis.
A student at a 2012 graduation is shaking someone's hand from his seat.

A student taking an exam
++++++++++
true or not.
no