Where to go depends, I think, on the item being verified. Wikipedia is useful for cultural memes and non-controversial items, but I'm not sure that query would qualify as an accuracy check.
Political beliefs and most other widely held beliefs don't usually warrant a check for me, either, unless I hold them and have been personally challenged on them. Sorry, but I just can't get excited when other people are wrong most of the time.
The one place I will check is when I run across an urban legend that interests me, and for that Snopes seems to work pretty well. Even there, however, I'm more interested in learning something new than I am in fact-checking someone else.
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