context: Chances are slight that Bernhard is a swan. It is probable that Sandra dropped the milk. It is highly likely that Greg is a frog. There is a better than even chance that if Greg is a frog, and Bernhard is a swan, then Julius is gray. It is likely that if Bernhard is a swan, and Greg is a frog, then Lily is white. It is probably not the case that if Greg is a frog, or Bernhard is a swan, then Yann is tired.
hypothesis: It is highly likely that either Greg is a frog, or Sandra dropped the milk.
valid_hypothesis: It is probably not the case that either Greg is a frog, or Sandra dropped the milk.
invalid_hypothesis: It is highly likely that either Greg is a frog, or Sandra dropped the milk.
hypothesis_assertion: Either Greg is a frog, or Sandra dropped the milk.