context: It is unlikely that Greg is a swan. It is almost certain that Yann is thirsty. There is little chance that Lily is green. It is probably not the case that if Yann is thirsty, or Lily is green, then Julius is a frog. Chances are about even that if Greg is a swan, and Yann is thirsty, then Daniel left the football. Chances are slight that if Greg is a swan, and Yann is thirsty, then John went to the garden.
hypothesis: It is highly unlikely that julius is a frog, and Greg is a swan.
valid_hypothesis: It is highly unlikely that julius is a frog, and Greg is a swan.
invalid_hypothesis: It is highly likely that julius is a frog, and Greg is a swan.
hypothesis_assertion: Julius is a frog, and Greg is a swan.