Maybe I don't, maybe I do. It is difficult to determine exactly how laissez-faire free-market capitalism works because there is always somebody screwing with it wanting to control others and steal their production without working for it while claiming a higher road. This regulation problem is as old as time itself.
Nonetheless, it is my best guess that "deflation and surprise deflation" are virtual non existent terms in truly free markets just like "zero nominal lower bound." Otherwise known as bullshit.
Think about it in terms of the laissez-faire free-market of ideas - The Internet.
When you go onto someone's website and they tell you something that isn't true, do you keep going back? I don't. When you get good information from someone's website, or simply enjoy the website, "get value", do you keep going back? I do.
It's the free market in action. It's the way life's interactions are supposed to be from natural laws.
The economy can work exactly the same way. Get government clear out of the money printing business and let people interact in whatever way they choose.
So, No. Unless you can demonstrate differently, the best I can surmise is that "zero nominal lower bound" makes no sense in a laissez-faire free-market capitalism economy.
Austrians analyze value - Keynesians analyze bullshit. In laissez-faire free-market capitalism Keynesianism central planning controls over people's lives - dies a wonderful death.
Just assume the problem away. Is that really your solution? You are guessing?