Clearly, their strategy is hail-mary’ish; they’ll be looking for a zinger or gaffe that they can pre-plan and rehearse; one that has no dependencies on anything Ryan would say before OR after. If needed, they’ll work it out with the moderator... or the podium setup crew... or the TV cameras... WHATEVER IT TAKES.
Biden is a Sagittarius, so am I, he is a few years older than me, I doubt he has a very flexible memory, I do know what can addle me and that is someone who rambles on and on with technical numbers, I’ll grow bored immediately, or with my bad hearing I’ll interpret a sentence incorrectly.
So I could predict Biden will be easily sidetracked by himself if he has to make a long commentary, I often ramble on explaing something in too much detail to the point I forgot what the whole conversation was about. Ryan could try that tactic, make Biden explain thins in detail, he will rtun off on a tangent, something sagittarians are also famous for.