Lying?
I am not certain about the “lying” idea: that aspies cannot lie convincingly. It is not in the DSM criteria, though some authors, like Attwood, mention it.
As a kid, I lied constantly, and I think I was pretty good at it. I did it because so many people were constantly bullying me. Eventually, I made up some fictitious stories which placed me in a positive light, and I used to tell them to people. They were believable stories, and, as far as I know, most people did believe me.