context: It is probably the case that Greg is a swan. There is a very good chance that Bernhard is a frog. There is a better than even chance that Mary went to the kitchen.
hypothesis: Chances are about even that either Greg is a swan, or Mary went to the kitchen.
valid_hypothesis: Chances are about even that either Greg is a swan, or Mary went to the kitchen.
invalid_hypothesis: It is highly unlikely that either Greg is a swan, or Mary went to the kitchen.
hypothesis_assertion: Either Greg is a swan, or Mary went to the kitchen.