context: A male guitar player is vigorously singing a not to a song in a poorly lit room.
hypothesis: It is highly likely that someone is playing a song for a group of people.
valid_hypothesis: It is highly likely that someone is playing a song for a group of people.
invalid_hypothesis: Chances are slight that someone is playing a song for a group of people.
hypothesis_assertion: Someone is playing a song for a group of people.