Speaker Pelosi is absolutely correct, even if unrealistic.
Still, I do believe Biden should debate Trump, but with a twist.
He shouldn't squander his and our time trying to debate Trump, live, on matters involving evidence, data, and facts — and when it comes to this president, truth is unthinkable. Yet Biden should debate him on national television — i.e., he should debate Trump's many video clips in which Trump lies with abandon while ignoring any resemblance to facts, which is every Trumpian video clip. Why not? In a real debate, Trump would just lie and molest facts anyway. But in this manner Biden would deprive him of a live presence on stage.
And I'm only half-joking.