A great discussion on Doubt and its value. You can read it here. An excerpt below:
"In some ways doubt can be taken as a bad thing, it makes you second guess the “facts” when you are far removed from it...Controversies and conspiracies are products of doubt and in part, critical thinking (I don’t think they are mutually exclusive). Sometimes controversy or conspiracy reveal the “truth” to us, other times, it can lead to questioning and policy changes that mess things up for us…however that is defined/looks like.