A family member asked me if I was saying ADHD exists or not.
By Definition, ADHD as a description of behavior exists.
The experts disagree on whether to call ADHD a disorder, disease, or part of the normal behavior spectrum. From my point of view, it is a simple description of behavior at one end of the NORMAL spectrum.
When I say normal I mean normal children (those without a disorder or disease fit the definition of ADHD). Just like any Gaussian (normal bell shaped) curve, there are extremes.