context: There is almost no chance that John got the apple. It is probably the case that Bernhard is a lion. It is likely that Lily is a swan. There is almost no chance that if Bernhard is a lion, or Lily is a swan, then Jessica is a mouse. It is likely that if Lily is a swan, or John got the apple, then Greg is a rhino. It is probably the case that if Bernhard is a lion, or Lily is a swan, then Julius is white.
hypothesis: It is impossible that either Greg is a rhino, or John got the apple.
valid_hypothesis: Chances are about even that either Greg is a rhino, or John got the apple.
invalid_hypothesis: It is impossible that either Greg is a rhino, or John got the apple.
hypothesis_assertion: Either Greg is a rhino, or John got the apple.