premise: and , `` Do I dare ? '' Time to turn back and descend the stair , With a bald spot in the middle of my hair-- [ They will say : `` How his hair is growing thin ! '' ] My morning coat , my collar mounting firmly to the chin , My necktie rich and modest , but asserted by a simple pin-- [ They will say : `` But how his arms and legs are thin ! '' ] What is asserted by a simple pin ?
hypothesis: The arms and legs