Well if I ever start following the textbook rules about the Oxford comma and splint infinitives, that's when you'll know I've been replaced with a Russian bot.

Well if I ever start following the textbook rules about the Oxford comma and splint infinitives, that's when you'll know I've been replaced with a Russian bot. In seriousness, language/grammar use analysis could potentially provide a hint that the person behind a user account has been replaced by another writer.