context: It is impossible that John got the football. It is impossible that Brian is a lion. It is probable that Lily is green. It is improbable that if either Lily is green, or John got the football, then Mary moved to the office. There is a very good chance that if John got the football, or Brian is a lion, then Greg is a rhino. There is little chance that if John got the football, and Brian is a lion, then Bill went to the cinema.
hypothesis: It is probable that brian is a lion, or Lily is green.
valid_hypothesis: It is probable that brian is a lion, or Lily is green.
invalid_hypothesis: It is unlikely that brian is a lion, or Lily is green.
hypothesis_assertion: Brian is a lion, or Lily is green.