What would be the difference between uncertainty and doubt in FUD?

[VarunAgw]

English is my second language and to me "Uncertainty" and "Doubt" means the same thing when it comes to trading.

Is there a good example to understand the difference between two?

[electronicash]

its all the same thing but FUD is very different since its often just lies from someone who will input doubts to your investment. lets say you invest in BTC and here comes a new account created just to say "tomorrow BTC will fall terribly because google bans bitcoin on searches. the pages of BTC on the net will be burred and eventually no one will learn about BTC."

It could be true or not. but you can definitely see for yourself that its impossible for someone not to learn and find out about BTC because links of it are everywhere and they can just type bitcoin.org in the url.