A man with no shirt speed skateboards downhill .
A fully dressed man is ice skating .
A man with no shirt speed skateboards downhill.
A fully dressed man is ice skating.
A man can't be ice skating and skateboarding at the same time.  The man can't be fully dressed but wearing no shirt.
A man ca n't be ice skating and skateboarding at the same time . The man ca n't be fully dressed but wearing no shirt .