Different videos have different interpretations, but there are commonalities.
-They don't play the social rules.
-Sigmas walk alone through choice.
-The solitude is a deliberate choice.
-They are idependence and self-reliant.
-they value solitude to centre themselves and to maintain inner peace.
-They have a strong sense of personal boundaries.
-They protect their energy, or personal space, and they enforce these boundaries with a quiet but firm resolve.
-This isn't done with harshness, but a respectful assertiveness.
-They commit to these boundaries, no matter the social pressure around them.
-They aren't driven by the need for attention or recognition.
Looking at this list, it is difficult to assess whether or not a person with an autism condition would be considered a "Sigma" by these definitions, that is, if they are using accurate language.
1. "They don't play the social rules" Is it because they are making that choice or is it because they don't have a full grasp of all the social, cultural, and communication nuances?
2. "Sigmas walk alone through choice" Is it a choice because they have finally given up on trying to fit in, or is it because of the isolation of having a higher intelligence, or is it out of social anxiety, etc.?
3. "They are independent and self-reliant" Is it because they are socially isolated for one reason or another?
We could go on here, but the point being that by this language, a person on the autism spectrum certainly could check all these boxes. Personally, I check most of them.
Another question: Is someone on the autism spectrum more likely to be a Sigma? Perhaps the personality profile of a Sigma is consistent with someone with high-intellect ASD? Just throwing that one out there.