context: It is almost certain that Brian is yellow. It is probably the case that Sandra left the football. It is unlikely that Mary moved to the garden.
hypothesis: It is improbable that brian is yellow, and Sandra left the football.
valid_hypothesis: It is probably the case that brian is yellow, and Sandra left the football.
invalid_hypothesis: It is improbable that brian is yellow, and Sandra left the football.
hypothesis_assertion: Brian is yellow, and Sandra left the football.