context: Chances are slight that Daniel left the apple. It is probably the case that John discarded the milk. It is probably not the case that Bernhard is a frog. It is likely that if either Daniel left the apple, or John discarded the milk, then Julius is a rhino. Chances are slight that if Daniel left the apple, or Bernhard is a frog, then Lily is a frog. There is little chance that if either Daniel left the apple, or John discarded the milk, then Greg is green.
hypothesis: Chances are about even that either Julius is a rhino, or Bernhard is a frog.
valid_hypothesis: Chances are about even that either Julius is a rhino, or Bernhard is a frog.
invalid_hypothesis: It is certain that either Julius is a rhino, or Bernhard is a frog.
hypothesis_assertion: Either Julius is a rhino, or Bernhard is a frog.