Joe wins ?
I honestly believe there is at least a 15% chance that Biden says/does something so stupid that he loses the debate instantly...
Such as telling Ryan to 'F off' on an open mic... on live, nationally broadcast television and radio.
So Bidet spends six days in prep.
There is such a thing as "too much" preparation; I've dealt with it before myself, because sometimes people are nervous about how I'm going to shoot off my mouth.
For those of us not competent in debate, a little bit of preparation, some preparation, helps.
But if there's too much preparation, one gets brittle and shatters.