context: It is unlikely that Jeff went to the garden. There is a better than even chance that Mary moved to the garden. It is highly likely that Julius is a lion. It is certain that if either Mary moved to the garden, or Jeff went to the garden, then John discarded the milk. It is improbable that if Jeff went to the garden, or Mary moved to the garden, then Gertrude is a sheep. Chances are about even that if Mary moved to the garden, and Julius is a lion, then Winona is a wolf.
hypothesis: We believe that either Mary moved to the garden, or John discarded the milk.
valid_hypothesis: It is unlikely that either Mary moved to the garden, or John discarded the milk.
invalid_hypothesis: We believe that either Mary moved to the garden, or John discarded the milk.
hypothesis_assertion: Either Mary moved to the garden, or John discarded the milk.