I can however see lots of application in various pattern analysis techniques based on machine learning. There's lots of places in those that a bit of fuzz won't

I can however see lots of application in various pattern analysis techniques based on machine learning. There's lots of places in those that a bit of fuzz won't really matter, at least for first pass filtering. Similarly voice recognition would probably have to deal with far larger errors from the transmission and capture of sound anyway. Just because it's not good for decryption, doesn't mean it isn't good for the overall set of NSA operations.