context: We doubt that Lily is a swan. Chances are slight that John went to the kitchen. It is likely that Daniel got the football. It is likely that if either Lily is a swan, or Daniel got the football, then Bernhard is green. It is impossible that if either Lily is a swan, or Daniel got the football, then Julius is a frog. There is a better than even chance that if either John went to the kitchen, or Daniel got the football, then Greg is white.
hypothesis: There is almost no chance that greg is white, or Lily is a swan.
valid_hypothesis: Chances are about even that greg is white, or Lily is a swan.
invalid_hypothesis: There is almost no chance that greg is white, or Lily is a swan.
hypothesis_assertion: Greg is white, or Lily is a swan.