Premise & hypothesis.
A police officer in a yellow vest directs traffic.

A tall person directing.
++++++++++
true or not.
it is not possible to tell

Premise & hypothesis.
A surfer on a red surfboard jumps over a high wave in the ocean.

The surfer is sitting
++++++++++
true or not.
no

Premise & hypothesis.
A child is floating on a raft and splashing in a pool.

A child is rafting down a swiftly moving river.
++++++++++
true or not.
no