context: It is almost certain that Emily is a sheep. It is likely that Sandra left the football. It is likely that Mary moved to the garden.
hypothesis: It is certain that either Sandra left the football, or Emily is a sheep.
valid_hypothesis: It is probably not the case that either Sandra left the football, or Emily is a sheep.
invalid_hypothesis: It is certain that either Sandra left the football, or Emily is a sheep.
hypothesis_assertion: Either Sandra left the football, or Emily is a sheep.