Down 4:00 to AC with 4 stages to go? Well, yeah, he could win, but it is very unlikely. If you want to try to quantify the odds, the bookies say something like AC 1/14 and Landa 16/1. Chapeau to Landa for picking up the ball after Porte, Aru, and Uran dropped it, but the GC is all but over.