context: We doubt that Greg is a swan. There is little chance that John went to the garden. It is certain that Gertrude is a sheep. Chances are slight that if Greg is a swan, or Gertrude is a sheep, then Mary put down the milk. It is probable that if Greg is a swan, or John went to the garden, then Julius is a rhino. We believe that if either John went to the garden, or Gertrude is a sheep, then Bernhard is white.
hypothesis: It is probable that greg is a swan, or John went to the garden.
valid_hypothesis: It is probably not the case that greg is a swan, or John went to the garden.
invalid_hypothesis: It is probable that greg is a swan, or John went to the garden.
hypothesis_assertion: Greg is a swan, or John went to the garden.