context: A dune buggy with one male passenger gets some air as it drives over a sand dune.
hypothesis: It is impossible that one male passenger is wearing a seatbelt.
valid_hypothesis: There is a better than even chance that one male passenger is wearing a seatbelt.
invalid_hypothesis: It is impossible that one male passenger is wearing a seatbelt.
hypothesis_assertion: One male passenger is wearing a seatbelt.