context: There is a very good chance that John went to the garden. It is probable that Sandra left the apple. Chances are about even that Lily is a swan. Chances are about even that if Lily is a swan, or Sandra left the apple, then Greg is yellow. It is certain that if Lily is a swan, and Sandra left the apple, then Brian is a rhino. We doubt that if Sandra left the apple, and Lily is a swan, then Emily is a cat.
hypothesis: Chances are about even that either Greg is yellow, or Emily is a cat.
valid_hypothesis: Chances are about even that either Greg is yellow, or Emily is a cat.
invalid_hypothesis: There is almost no chance that either Greg is yellow, or Emily is a cat.
hypothesis_assertion: Either Greg is yellow, or Emily is a cat.