I do not entirely agree. Stuttering is pretty blatent if you see somone several times. The people I met who did stutter immediately revealed themselves after I stuttered and I could already he stuttered just didnt want to point it out right away. Also, back to wheelchair, not everylne is in a wheelchair because they cant want. It is temporary or they a healing from an injury. That being said, if you took a survey and asked are you in wheelchair? Your results would be drastically skewed. Type 1 diabetes isnt visual, yet Ive met more people with that when they make up .05 percent. My little brother did not even go to grade school with anyone who had a stutter. He defiently thinks it is rarer than his disease.