Premise & hypothesis.
A cloud of smoke floats in front of a young woman wearing glasses and multiple necklaces.

The woman is smoking weed.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A girl and two boys dressed in bright ethnic garb are walking together.

Children in bright clothes are walking.
++++++++++
true or not.
yes

Premise & hypothesis.
Two homeless men are sitting on the sidewalk.

Two men are friends.
++++++++++
true or not.
it is not possible to tell