I don't think it's an Aspie thing - I see mistakes in writing all the time, and, I know this is news to Aspies here, but NTs make mistakes too!
I get this a lot but I never considered it to be another ''Aspie thing''. It's just that I read or write things too quick and probably don't concentrate properly. Also when I read instructions on the packaging of a microwave meal, I keep reading the number of minutes it says over and over again because I keep thinking I might have read it wrong. But I think it's an OCD thing mixed with Emetophobia (fear of being sick). In case you're not sure how Emetophobia could be related to this, it's because if I read the instructions wrong I could then get food poisoning, which involves vomiting and salmonella.
Also (this isn't exactly related to this topic) when I started up the big school, I always used to ask my cousin (who walked to school with me) if I had my bag on my back, and he said, ''yes, why?'' and I used to say, ''well I keep thinking I'm imagining it there, so I just want somebody else to check for me.''
I still sometimes do things like that today. I blame that on absent-mindedness.
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