context: There is almost no chance that Greg is a lion. There is little chance that Julius is green. We believe that Gertrude is a sheep. There is a better than even chance that if Julius is green, and Gertrude is a sheep, then Fred left the football. It is likely that if Julius is green, or Gertrude is a sheep, then Mary moved to the office. There is almost no chance that if Julius is green, and Gertrude is a sheep, then Bernhard is a swan.
hypothesis: It is impossible that gertrude is a sheep, or Bernhard is a swan.
valid_hypothesis: We believe that gertrude is a sheep, or Bernhard is a swan.
invalid_hypothesis: It is impossible that gertrude is a sheep, or Bernhard is a swan.
hypothesis_assertion: Gertrude is a sheep, or Bernhard is a swan.