context: It is highly unlikely that Brian is a lion. It is highly unlikely that Emily is a mouse. Chances are slight that Mary went to the office. It is highly unlikely that if either Mary went to the office, or Emily is a mouse, then Daniel is in the garden. There is a very good chance that if Emily is a mouse, and Mary went to the office, then John left the apple. There is a better than even chance that if either Emily is a mouse, or Mary went to the office, then Sandra took the apple.
hypothesis: It is highly unlikely that either Emily is a mouse, or Daniel is in the garden.
valid_hypothesis: It is highly unlikely that either Emily is a mouse, or Daniel is in the garden.
invalid_hypothesis: It is certain that either Emily is a mouse, or Daniel is in the garden.
hypothesis_assertion: Either Emily is a mouse, or Daniel is in the garden.