I guess Wikipedia is meant to be read not to be believed.
I think it will be wrong to ask 'Do you believe Britannica?'.
Encyclopedia articles are into describing things and not on convincing people. If a listing is wrong, then it can be corrected by the community.
Take for example:
There is a Chief Justice(head of the highest court) in the Philippines who will undergo Impeachment trial in the Philippines this month. Some haters went to his Wikipedia page and replaced his title to 'Thief Justice'.
Well, if you go back, you will see it's corrected.
The good thing about Wiki, it is easy to correct things in a timely fashion.