context: It is certain that Winona is a cat. It is almost certain that Jeff discarded the apple. There is a better than even chance that Bernhard is a lion. We believe that if either Winona is a cat, or Jeff discarded the apple, then Brian is green. It is likely that if Jeff discarded the apple, and Winona is a cat, then Lily is white. Chances are slight that if either Bernhard is a lion, or Jeff discarded the apple, then Greg is yellow.
hypothesis: It is probable that either Greg is yellow, or Brian is green.
valid_hypothesis: It is highly unlikely that either Greg is yellow, or Brian is green.
invalid_hypothesis: It is probable that either Greg is yellow, or Brian is green.
hypothesis_assertion: Either Greg is yellow, or Brian is green.