^^On the same note, I found this table which shows that the Weimar Republic did suffer a brief year or so of DEFLATION prior to the now infamous hyper-inflation, so it shows that this can happen and (in response to MM's point) why some 'experts' get confused and entrench themselves into positions of inflation or deflation, rather than one followed by the other...
Anyway the chart:
Clearly, where I took this from:
Daily Pundit » WIN - Whip Inflation Now? Nope.
the commentator believes that the USA is at the end of the deflation phase, hence his (not my) arrows...