context: It is certain that Brian is a lion. It is probably not the case that Daniel got the milk. It is impossible that Emily is a sheep. There is almost no chance that if either Emily is a sheep, or Brian is a lion, then John moved to the office. We believe that if Emily is a sheep, and Daniel got the milk, then Mary went to the kitchen. Chances are slight that if Brian is a lion, or Emily is a sheep, then Greg is yellow.
hypothesis: It is improbable that either Greg is yellow, or Mary went to the kitchen.
valid_hypothesis: It is improbable that either Greg is yellow, or Mary went to the kitchen.
invalid_hypothesis: There is a better than even chance that either Greg is yellow, or Mary went to the kitchen.
hypothesis_assertion: Either Greg is yellow, or Mary went to the kitchen.