Premise & hypothesis.
A male is sitting in a chair with a blue surgical mask on.

A female is standing next to the patients bed
++++++++++
true or not.
no

Premise & hypothesis.
Dogs on grass.

Dogs in a field
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
The sign indicates a marker for The Arlington Line.

The sign notes a historical fact.
++++++++++
true or not.
it is not possible to tell