Premise & hypothesis.
Two UFC fighters duke it out on the mat.

Two UFC fighters duke it out on the mat while the large crowd watches with excitement.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A girl with extended arms goes down a slide.

A girl has a big smile on her face while she goes down a slide in the park.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A man reads a book, on a city sidewalk, while a lady waits and other pedestrians walk past.

A man is reading a romance novel.
++++++++++
true or not.
it is not possible to tell