context: It is highly unlikely that Lily is a frog. It is almost certain that Emily is a mouse. It is probably the case that Daniel left the football. Chances are about even that if Daniel left the football, and Emily is a mouse, then John went to the garden. It is impossible that if Daniel left the football, or Emily is a mouse, then Mary moved to the office. It is likely that if either Daniel left the football, or Emily is a mouse, then Brian is green.
hypothesis: We doubt that either Mary moved to the office, or Brian is green.
valid_hypothesis: We doubt that either Mary moved to the office, or Brian is green.
invalid_hypothesis: It is highly likely that either Mary moved to the office, or Brian is green.
hypothesis_assertion: Either Mary moved to the office, or Brian is green.