Human mediatiation is key. Skilled intelligence analysis made by well versed operators. even then it is very hard.
As one intelligence analyst once told me " it is looking for a needle in stack of needles"
As one intelligence analyst once told me " it is looking for a needle in stack of needles"
The problems Schneier is talking about have very different characteristics than the ones in this article. So the problems Schneier is talking about are still very real. But solving little pieces of the problem is definitely possible, especially with a good amount of human mediation.