When Will Power crossed the line behind winner Scott Dixon at last weekend's IndyCar race at Mid-Ohio, he effectively sealed the manufacturers' championship for Chevrolet in its first year back in the series.
In theory, it could still lose. But to do so would require Lotus-powered Simona de Silvestro to win all three of the remaining races, with the best Chevrolet finishing behind the best-placed Honda on each occasion.
In the strictest definition of the word, it's not impossible. But apply the rule of probability and it comes in somewhere around 77-year-old AJ Foyt announcing that he's getting back behind the wheel at Baltimore.
It would be incorrect to assume that rival Honda came into the war with an advantage based on its status as sole engine supplier since 2006, as this year's 2.2-litre V6 turbos have so little in common with the previous 3.5-litre naturally-aspirated V8s that comparisons are meaningless.