Premise: Two caucasian males, one wearing a denim baseball cap and purple shirt, second guy with no baseball cap, wearing safety goggles, straddling a wood pallet.

Hypothesis: Two caucasian males, one wearing a denim baseball cap and purple shirt, second guy with no baseball cap, wearing safety goggles, straddling a wood pallet under a bright yellow sun.
it is not possible to tell

Premise: A big dog sniffs a little dog.

Hypothesis: The little dog is happy.
it is not possible to tell

Premise: A man shovels snow off of a sidewalk while a child in a red parka walks by.

Hypothesis: The man is sitting out in his bathing suit.
no

Premise: Two men in blue shirts and black pants talking.

Hypothesis: Two men are talking about the party last night.
it is not possible to tell