The debate about distinguishing AS from HFA is partly due to a tautological dilemma where disorders are defined based on severity of impairment, so that studies that appear to confirm differences based on severity are to be expected.
Debata o razlikovanju AS-a od HFA djelomično ima razlog u tautološkoj dilemi gdje su poremećaji definirani na osnovi ozbiljnosti oštećenja, tako da su studije koje potvrđuju razlike zasnovane na ozbiljnosti očekivane.