context: It is probably the case that Mary went to the garden. It is likely that Daniel is in the garden. We doubt that Lily is a swan.
hypothesis: Chances are about even that either Daniel is in the garden, or Mary went to the garden.
valid_hypothesis: Chances are about even that either Daniel is in the garden, or Mary went to the garden.
invalid_hypothesis: It is almost certain that either Daniel is in the garden, or Mary went to the garden.
hypothesis_assertion: Either Daniel is in the garden, or Mary went to the garden.