Unless Meredith was married to Meredith, then Meridiths' would work. And don't try that two Merediths can't have an autistic son crap.
It's not that I'm taking it personally, it's just that you're simplifying a very complex condition, one that I know quite a bit about and your statement was completely wrong. (If being different socially is what denotes on the spectrum then the vast majority of people are there.) I was heavily involved in developing support and treatments for years so I learned a few things. While Asperger's is over-diagnosed these days it is a real condition and if a professional has diagnosed her then I don't doubt that Thunberg has it. She certainly presents as an Aspie. A little more information on the subject: https://www.aane.org/asperger-profile-strengths/ https://www.aane.org/asperger-profile-big-picture-challenges/