Premise & hypothesis.
An older white man in a black cowboy hat sings into a microphone.

He is at a Karaoke bar.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A young boy sitting on a water jet in a pool.

a boy sitting in the pool
++++++++++
true or not.
yes

Premise & hypothesis.
A construction worker is bent over the beams concentrating on his work.

A construction bends over beams.
++++++++++
true or not.
yes