Premise & hypothesis.
A silhouette of a man about to hit a volleyball on the beach at sunset.

A volleyball player is preparing to block a spike.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A little boy is reading while his dog looks on.

A boy is reading.
++++++++++
true or not.
yes

Premise & hypothesis.
Two people in rafting gear standing on a dry, rocky riverbank, pointing at the river.

Two people are drowning in the river.
++++++++++
true or not.
no