What accounts for his inability to conjugate verbs...match subject and predicate...his total lack of knowledge of current events, his failure to post links or references...his atrocious syntax?Nah, I believe he's dyslexic. He communicates well, and his meaning was clear. Autocorrect and spellcheck just miss things where the wrong word is used but spelled correctly.
Whatever is wrong with him, he is functionally illiterate.