context: It is almost certain that Bernhard is a lion. It is unlikely that Winona is a mouse. Chances are slight that Julius is a swan. Chances are about even that if Julius is a swan, and Bernhard is a lion, then Sandra left the milk. It is impossible that if Julius is a swan, and Bernhard is a lion, then Brian is a frog. We doubt that if Julius is a swan, or Winona is a mouse, then Mary went to the office.
hypothesis: There is almost no chance that either Bernhard is a lion, or Winona is a mouse.
valid_hypothesis: We believe that either Bernhard is a lion, or Winona is a mouse.
invalid_hypothesis: There is almost no chance that either Bernhard is a lion, or Winona is a mouse.
hypothesis_assertion: Either Bernhard is a lion, or Winona is a mouse.