With how much fog there is around elections, "concerns" surrounding mail-in voting they've been stoking the embers on for years, electronic voting with no paper trail, straight up stealing of ballots, etc, that we know is going on, there's so much bs we don't know about that I can't see a scenario in which Biden clearly won as you say. Exit polls will be branded fake news, results as fraudulent. We won't even know if it's true, really.