context: It is probably the case that Mary went to the garden. It is impossible that John dropped the milk. There is almost no chance that Greg is a rhino.
hypothesis: It is probable that mary went to the garden, or John dropped the milk.
valid_hypothesis: It is probable that mary went to the garden, or John dropped the milk.
invalid_hypothesis: We doubt that mary went to the garden, or John dropped the milk.
hypothesis_assertion: Mary went to the garden, or John dropped the milk.