context: It is probable that Bernhard is a swan. It is highly unlikely that John left the apple. It is highly unlikely that Daniel is in the garden. It is unlikely that if Daniel is in the garden, or John left the apple, then Sandra took the milk. There is a very good chance that if either Bernhard is a swan, or Daniel is in the garden, then Greg is white. There is little chance that if John left the apple, or Daniel is in the garden, then Mary went to the office.
hypothesis: There is almost no chance that either Greg is white, or Daniel is in the garden.
valid_hypothesis: There is a better than even chance that either Greg is white, or Daniel is in the garden.
invalid_hypothesis: There is almost no chance that either Greg is white, or Daniel is in the garden.
hypothesis_assertion: Either Greg is white, or Daniel is in the garden.