I often default to taking people literally. Because of that, people who don't like me sometimes suggest I am autistic as a faux polite way of publicly calling me a social retard.

Although ASD individuals are prone to being very literal, I have observed two other types of people who tend to do that.

The first are people from low context cultures, where you say what you mean and mean what you say. Except for certain aspects of military intelligence and information security, military culture is generally like this. My father and ex husband were both career military. So, I tend towards being blunt and direct. Some people find this refreshing. Others find it abhorrent.

The other group of people that I have observed as tending to be very literal and taking people at their word is people with PhDs. Less educated people routinely leap to conclusions that are rooted in personal bias. People with sufficient education tend to consider only the facts in evidence. They aren't stupid and they aren't unaware of the fact that there may be additional facts not currently in evidence. But they are less prone to shitty, prejudiced behaviors that are the lifeblood of sexism, racism, etc.

So, I am not at all confident that the way ASD individuals think is a) unique to them or b) evidence of mental defect.

I am highly skeptical of the degree to which all sorts of differences get labeled and medicalized and framed as a defect. They used to do this to homosexuals. IIRC, homosexuality is no longer officially listed as a mental disorder (aka form of insanity).

So, while I know that a battery of tests can cast light on certain things, I still fail to see why this specific test is seen as indicative of being on the spectrum.