@simon_brooke @adamgreenfield I think one way complex (as opposed to chaotic) sentence structure can come about is if you grow up reading more than socializing, since language for speech and for writing is different. But reading more than socializing can happen if you are #ASD or #ADHD (if you couldn't focus enough on conversations when you were young), so that doesn't narrow it down.
@holly @adamgreenfield certainly happened for me!