context: Three males and one female are posing for a photograph with snow on the ground and mountains covered with green trees and snow in the background.
hypothesis: It is probable that four friends pose for a photo on their ski holiday.
valid_hypothesis: It is probably not the case that four friends pose for a photo on their ski holiday.
invalid_hypothesis: It is probable that four friends pose for a photo on their ski holiday.
hypothesis_assertion: Four friends pose for a photo on their ski holiday.