Premise: Two women are talking on cellphones while sitting on stone stairs.

Hypothesis: The ladies are sitting and chatting on the phone.
yes

Premise: Woman expressively playing an electric guitar in front of a microphone.

Hypothesis: The woman was playing music.
it is not possible to tell

Premise: A person rides a dirt bike.

Hypothesis: A person is riding a dirt bike.
yes

Premise: A woman in a sparkly dress, singing and playing guitar on stage.

Hypothesis: The singer is peforming for a party.
it is not possible to tell