context: We doubt that Bill went to the kitchen. It is highly likely that Gertrude is a cat. There is a better than even chance that Greg is white. It is impossible that if Gertrude is a cat, or Greg is white, then John left the apple. It is certain that if Greg is white, or Bill went to the kitchen, then Julius is a swan. It is probably the case that if either Gertrude is a cat, or Greg is white, then Mary moved to the garden.
hypothesis: We doubt that either Mary moved to the garden, or Greg is white.
valid_hypothesis: There is a very good chance that either Mary moved to the garden, or Greg is white.
invalid_hypothesis: We doubt that either Mary moved to the garden, or Greg is white.
hypothesis_assertion: Either Mary moved to the garden, or Greg is white.