context: It is highly unlikely that Emily is a sheep. It is highly likely that Daniel is in the garden. It is highly likely that Sandra got the milk. There is a better than even chance that if Emily is a sheep, and Sandra got the milk, then Mary went to the garden. We believe that if Sandra got the milk, or Daniel is in the garden, then Greg is a rhino. It is highly likely that if Daniel is in the garden, or Emily is a sheep, then Brian is a lion.
hypothesis: There is a very good chance that either Mary went to the garden, or Brian is a lion.
valid_hypothesis: There is a very good chance that either Mary went to the garden, or Brian is a lion.
invalid_hypothesis: It is unlikely that either Mary went to the garden, or Brian is a lion.
hypothesis_assertion: Either Mary went to the garden, or Brian is a lion.