context: It is probably the case that Lily is a rhino. There is almost no chance that Gertrude is a mouse. It is improbable that John moved to the office. We doubt that if Gertrude is a mouse, or Lily is a rhino, then Sandra got the milk. Chances are about even that if John moved to the office, or Gertrude is a mouse, then Greg is yellow. We doubt that if either Lily is a rhino, or Gertrude is a mouse, then Julius is green.
hypothesis: It is highly unlikely that either John moved to the office, or Greg is yellow.
valid_hypothesis: It is highly unlikely that either John moved to the office, or Greg is yellow.
invalid_hypothesis: There is a better than even chance that either John moved to the office, or Greg is yellow.
hypothesis_assertion: Either John moved to the office, or Greg is yellow.