[hilux]

> ... how the definition of ADHD is completely arbitrarily defined, as the diagnosis isn't based on any genetic marker.

Did you know that 90% of cases of ALS aren't "based on any genetic marker"? Does that mean ALS is "arbitrarily defined"? What does that even mean? Are you saying it isn't real?

[TeaBrain]

I wasn't saying anything from my point of view. I was simply explaining the misinterpretation in the comment above, though I should have said biomarker instead of genetic marker.