context: Chances are about even that Daniel took the football. There is little chance that Brian is a rhino. It is impossible that Lily is white. It is highly likely that if Lily is white, and Daniel took the football, then Julius is a swan. It is highly likely that if either Daniel took the football, or Lily is white, then Yann is tired. It is probably the case that if either Brian is a rhino, or Lily is white, then Mary moved to the garden.
hypothesis: Chances are about even that either Brian is a rhino, or Yann is tired.
valid_hypothesis: Chances are about even that either Brian is a rhino, or Yann is tired.
invalid_hypothesis: It is almost certain that either Brian is a rhino, or Yann is tired.
hypothesis_assertion: Either Brian is a rhino, or Yann is tired.