Premise: The dog is carrying a whiffle ball outside

Hypothesis: His owner threw the ball for him to fetch.
it is not possible to tell

Premise: A cook in a white chef's jacket is preparing food on a plate in front of him.

Hypothesis: A man in a white chef's jacket is preparing food on a plate in front of him.
it is not possible to tell

Premise: Girls in black bikinis playing beach volleyball.

Hypothesis: The girls are eating hamburgers.
no

Premise: Two young fair girls are smiling a posing together while they ride in a boat wearing floatation vests.

Hypothesis: Two girls swim beside the raft.
no