context: There is almost no chance that Lily is a lion. It is certain that Greg is a swan. Chances are about even that Daniel is in the garden.
hypothesis: It is certain that lily is a lion, or Greg is a swan.
valid_hypothesis: It is certain that lily is a lion, or Greg is a swan.
invalid_hypothesis: It is impossible that lily is a lion, or Greg is a swan.
hypothesis_assertion: Lily is a lion, or Greg is a swan.