If you know the next card to be dealt at the beginning of a round and you sit at box 1, then you have an advantage or disadvantage according to the card's value as an initial card in your 2-card initial hand. We all know this to be about 52% for an Ace, 13% for a ten, and various negative figures for other cards. No problem as to knowing what you should do. But here is a thought experiment...
Suppose you are playing heads-on with the dealer and you know the next card to be dealt cannot be a certain card. Example...let's say you are 100% certain that the next card will not be a 5. This particular 5 CANNOT be dealt to you as a first card but could be dealt to the dealer as a first card or second card, or to you as a second card for your initial hand...or as a hit card for you or the dealer.
What, if any, advantage does this knowledge give you?