context: It is highly likely that Jeff went to the kitchen. We doubt that Bill left the milk. There is a very good chance that Lily is a rhino. It is probable that if either Bill left the milk, or Jeff went to the kitchen, then Brian is a frog. It is improbable that if either Jeff went to the kitchen, or Bill left the milk, then Greg is yellow. It is probably the case that if Bill left the milk, or Lily is a rhino, then John moved to the garden.
hypothesis: It is impossible that either Greg is yellow, or John moved to the garden.
valid_hypothesis: There is a better than even chance that either Greg is yellow, or John moved to the garden.
invalid_hypothesis: It is impossible that either Greg is yellow, or John moved to the garden.
hypothesis_assertion: Either Greg is yellow, or John moved to the garden.