FUD

What's the difference between uncertainty and doubt? One of those is redundant. I think whoever coined the acronym included them both so you can pronounce it.

http://www.google.com/search?hl=en&client=firefox-a&hs=h2p&rls=org.mozilla%3Aen-US%3Aofficial&q=define%3Auncertainty&meta=&aq=f&aqi=g-c3g-sx5&aql=&oq=&gs_rfai=
# being unsettled or in doubt or dependent on chance; "the uncertainty of the outcome"; "the precariousness of his income"
# doubt: the state of being unsure of something


http://www.google.co.nz/search?hl=en&client=firefox-a&hs=J3p&rls=org.mozilla%3Aen-US%3Aofficial&q=define%3Adoubt&meta=&aq=f&aqi=&aql=&oq=&gs_rfai=
# consider unlikely or have doubts about; "I doubt that she will accept his proposal of marriage"
# the state of being unsure of something
# lack confidence in or have doubts about; "I doubt these reports"; "I suspect her true motives"; "she distrusts her stepmother"
# uncertainty about the truth or factuality or existence of something; "the dubiousness of his claim"; "there is no question about the validity of the enterprise"