Premise & hypothesis.
There are two men with sunglasses, one of which is wearing a hat and a backpack.

The two men have matching backpacks.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A woman with short brown hair is wiping a railing with a yellow towel.

A woman with brown hair is wiping with a towel.
++++++++++
true or not.
yes

Premise & hypothesis.
A boy wearing blue shorts is doing a back flip in the air under a tree.

A boy is riding his bicycle.
++++++++++
true or not.
no