premise: A man dressed in a surfing shirt and blue and white shorts skillfully guides his yellow board with its multicolored sail over the crest of an ocean wave, flipping over in the process. hypothesis: a man has surfed for an hour.
neutral: There's no way of knowing that the surfer has been surfing for an hour.|neutral: There is no way to determine how long the man dressed in surfing shirt and blue and white shorts has surfed for an hour.|neutral: No way to know that he has surfed for an hour.