context: There is a better than even chance that Emily is a mouse. It is probably the case that Lily is white. There is a very good chance that Sandra dropped the apple. There is almost no chance that if Sandra dropped the apple, and Emily is a mouse, then Bill got the milk there. Chances are about even that if Lily is white, or Sandra dropped the apple, then Brian is a frog. It is probable that if either Emily is a mouse, or Sandra dropped the apple, then Greg is green.
hypothesis: Chances are about even that either Brian is a frog, or Lily is white.
valid_hypothesis: Chances are about even that either Brian is a frog, or Lily is white.
invalid_hypothesis: It is almost certain that either Brian is a frog, or Lily is white.
hypothesis_assertion: Either Brian is a frog, or Lily is white.