context: It is certain that Bernhard is a lion. It is highly unlikely that Julius is a swan. It is improbable that Brian is a frog. It is impossible that if Julius is a swan, and Bernhard is a lion, then Jason is bored. It is probably the case that if Brian is a frog, and Bernhard is a lion, then John dropped the apple. It is highly unlikely that if Brian is a frog, or Julius is a swan, then Greg is yellow.
hypothesis: It is impossible that greg is yellow, and John dropped the apple.
valid_hypothesis: It is impossible that greg is yellow, and John dropped the apple.
invalid_hypothesis: It is probable that greg is yellow, and John dropped the apple.
hypothesis_assertion: Greg is yellow, and John dropped the apple.