I've been playing blackjack for a few years now, and have the basic strategy down pat. A question, though. As we know, the strategy is to double when you have an Ace showing and the dealer has a 10 up. My question: Why do you NOT double when you have an Ace and the dealer also has an Ace, but no blackjack? We know the dealer doesn't have a 10, so it seems to me it makes just as much sense, mathematically, to double in the second scenario as it does in the first. I don't do it, by the way, because I trust the accuracy of the Basic Strategy computations... but it always makes me wonder. Thoughts?