OK, this article explains deflationary spiral. This depends on the assumption that people hold out on buying non-urgent goods in the belief that prices will continue to fall - leading prices to fall further. But in the current economic climate, almost nobody is buying non-urgent goods anyway. (Yet we have seen consistent inflation) The current 'deflation' is primarily led by a sharp downtick in oil prices that won't…
Last month, the US inflation rate was 0.8%.
For 2014 as a whole, it was 1.6%.
This is, in fact, credited in part to low consumer demand. Slack demand generally leads to job cuts, which leads to even slacker demand. That's the spiral they talk about.
> The current 'deflation' is primarily led by a sharp downtick in oil prices that won't be repeated - there's no immediate suggestion that prices will continue to fall.
This is why economists talk about core inflation, to remove as much as possible the influence of volatile commodities such as oil. Inflation will remain very low even with oil prices go up. Since 2008, inflation has actually at times been negative (i.e., deflation.)
People who think deflation is a good thing need only look at the Great Depression, Japan, the present Eurozone, and the 2008 recession. Just because high inflation is bad doesn't mean that deflation is good.