context: It is highly unlikely that Gertrude is a mouse. It is unlikely that Brian is a lion. It is impossible that Julius is a rhino. It is probable that if Gertrude is a mouse, and Julius is a rhino, then Lily is white. It is unlikely that if either Gertrude is a mouse, or Julius is a rhino, then Mary went to the garden. It is probable that if either Brian is a lion, or Gertrude is a mouse, then John got the milk.
hypothesis: Chances are about even that either Lily is white, or Gertrude is a mouse.
valid_hypothesis: It is highly unlikely that either Lily is white, or Gertrude is a mouse.
invalid_hypothesis: Chances are about even that either Lily is white, or Gertrude is a mouse.
hypothesis_assertion: Either Lily is white, or Gertrude is a mouse.