Premise: A man tuning or changing the strings on his guitar.

Hypothesis: The man is holding an instrument.
yes

Premise: two men standing outside next to a building.

Hypothesis: The men are going in the building.
it is not possible to tell

Premise: Bruce Springsteen, dressed in black, is holding a microphone and pointing to a crowd.

Hypothesis: There is a man pointing to a crowd
yes

Premise: Boy holding pool cue looking at person in sweater

Hypothesis: a boy is playing pool with someone
it is not possible to tell