context: Chances are slight that Brian is yellow. There is a better than even chance that Lily is a lion. There is little chance that Emily is a mouse. It is improbable that if either Brian is yellow, or Lily is a lion, then Daniel took the football. Chances are about even that if either Brian is yellow, or Emily is a mouse, then Mary went to the park. Chances are slight that if Lily is a lion, or Brian is yellow, then Greg is a swan.
hypothesis: There is little chance that greg is a swan, or Daniel took the football.
valid_hypothesis: There is little chance that greg is a swan, or Daniel took the football.
invalid_hypothesis: There is a better than even chance that greg is a swan, or Daniel took the football.
hypothesis_assertion: Greg is a swan, or Daniel took the football.