context: A man wearing a blue apron and long rubber boots is dragging a flotation device from a long row of flotation devices.
hypothesis: It is unlikely that a worker pulls up his long boots before climbing onto the flotation device.
valid_hypothesis: It is unlikely that a worker pulls up his long boots before climbing onto the flotation device.
invalid_hypothesis: It is probable that a worker pulls up his long boots before climbing onto the flotation device.
hypothesis_assertion: A worker pulls up his long boots before climbing onto the flotation device.