context: It is probable that Brian is a lion. It is likely that Jeff dropped the apple. Chances are slight that John discarded the milk. It is highly unlikely that if either Jeff dropped the apple, or John discarded the milk, then Winona is a wolf. It is highly likely that if Brian is a lion, and John discarded the milk, then Jessica is a mouse. It is probable that if Brian is a lion, and Jeff dropped the apple, then Greg is green.
hypothesis: It is highly likely that brian is a lion, or Jeff dropped the apple.
valid_hypothesis: It is highly likely that brian is a lion, or Jeff dropped the apple.
invalid_hypothesis: It is impossible that brian is a lion, or Jeff dropped the apple.
hypothesis_assertion: Brian is a lion, or Jeff dropped the apple.