A young boy in a t-shirt , sweats and a red hat , skateboarding in a skateboard arena , with an audience on the side and blue skies above .
It is probable that a skateboarder goes for a swim in the ocean .
It is impossible that a skateboarder goes for a swim in the ocean .
It is probable that a skateboarder goes for a swim in the ocean .
A skateboarder goes for a swim in the ocean .