When I hear the term, "high functioning autism", I think of Asperger syndrome; verbal the majority of the time, obviously socially awkward but not enough to require constant assistance, and in need of a few mild/moderate adaptations to succeed at work or school.
When I hear "very high functioning" I think of people closer to the "broad autism phenotype" who are right on the edge, showing a few symptoms, but not enough and with not enough severity to be in any way truly debilitating.
I consider myself to have "moderate Asperger syndrome". I know Asperger's isn't a thing in the DSM anymore, but I like to describe it that way, because it acknowledges the fact that I'm high functioning, but still not high functioning enough to pass for NT, regardless of how hard I try.
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"Survival is insufficient" - Seven of Nine
Diagnosed with ASD level 1 on the 10th of April, 2014
Rediagnosed with ASD level 2 on the 4th of May, 2019
Thanks to Olympiadis for my fantastic avatar!