context: Chances are slight that Bernhard is yellow. It is impossible that Bill went to the kitchen. It is probably the case that Winona is a wolf. It is almost certain that if Bernhard is yellow, and Winona is a wolf, then Greg is a frog. There is a better than even chance that if Winona is a wolf, or Bernhard is yellow, then Mary picked up the apple. Chances are about even that if Bill went to the kitchen, and Winona is a wolf, then Lily is green.
hypothesis: Chances are about even that either Bernhard is yellow, or Mary picked up the apple.
valid_hypothesis: Chances are about even that either Bernhard is yellow, or Mary picked up the apple.
invalid_hypothesis: There is almost no chance that either Bernhard is yellow, or Mary picked up the apple.
hypothesis_assertion: Either Bernhard is yellow, or Mary picked up the apple.