However, you are saying that it IS possible, just only for one week,
No, that is not at all what DeathAndTaxes is saying, and this kind of complete lack of understanding is exactly why I opened with my "don't roll your own crypto" article.
As soon as I typed that I thought "that other guy is going to hate this". It was just a little idea, Andy, you can relax!
Moreover the secret-keeper-Oracle was just my guess at how to make the blockchain aware of an external state. I'm not surprised to learn that it didn't work, but I do expect something to work eventually. So far gmaxwell has proposed I investigate SNARK, for example. Others have suggested Etherium or MasterCoin but, precisely as was argued, these newer ideas can't be seriously considered yet. I also considered a true alt-currency which can just be moved around in two different ways (directly through transactions and indirectly through the contract mechanism), which might be at least a practical place to test everything out.
So I have all kinds of guesses, but I expected that, instead of taking them as proposals, someone would say "Don't do that, what you really need sounds more like X".