context: Chances are slight that Daniel left the apple. Chances are slight that Bernhard is a frog. It is certain that John moved to the office. There is a very good chance that if John moved to the office, and Daniel left the apple, then Greg is a swan. It is probably not the case that if Daniel left the apple, or Bernhard is a frog, then Lily is a lion. It is highly likely that if either Bernhard is a frog, or Daniel left the apple, then Mary went to the garden.
hypothesis: It is probably the case that greg is a swan, or Lily is a lion.
valid_hypothesis: It is improbable that greg is a swan, or Lily is a lion.
invalid_hypothesis: It is probably the case that greg is a swan, or Lily is a lion.
hypothesis_assertion: Greg is a swan, or Lily is a lion.