context: There is little chance that Greg is a rhino. We doubt that Gertrude is a mouse. Chances are about even that Mary went to the garden. Chances are about even that if Greg is a rhino, and Mary went to the garden, then Jessica is a wolf. It is improbable that if Mary went to the garden, or Gertrude is a mouse, then Lily is white. It is almost certain that if Gertrude is a mouse, or Greg is a rhino, then Sandra left the milk.
hypothesis: There is a very good chance that either Greg is a rhino, or Gertrude is a mouse.
valid_hypothesis: It is probably not the case that either Greg is a rhino, or Gertrude is a mouse.
invalid_hypothesis: There is a very good chance that either Greg is a rhino, or Gertrude is a mouse.
hypothesis_assertion: Either Greg is a rhino, or Gertrude is a mouse.