The document lists 10 observations about impossibilities and 10 things the reader is doing. It notes physical tasks that are impossible like counting your hairs or washing your eyes with soap. It also points out actions the reader is taking as they read it, like attempting to say "P" without separating lips, laughing at themselves, and checking for a missing number 5. The purpose seems to be amusing the reader by noting things they cannot do physically and predicting actions they will reflexively take as they read.