Oh.. Common with that blood flow thing. Do you know how many stutterers they have tested ? Do you have the data ? Do you how varying is the stutter with different people. Good days.. Bad days.. Are you sure if they had the same result if they have tested someone who was not stuttering at the time period when they were testing him. I know behind all these nonsense theories how many "ASSUMPTIONS" are made. Test some random 10 guys and make it applicable for Millions. Give me a break !!