I'd say it's a combination of things. Partly the fact they actually have humans reviewing material and performing at least a modicum of veracity verification. B

I'd say it's a combination of things. Partly the fact they actually have humans reviewing material and performing at least a modicum of veracity verification. BUT, this happens over time. So yes, while Wikipedia is a target of mis/dis-information, a lot of it is eventually cleaned up, and where there's back-and-forth changes, this is pointed out, meaning readers are warned to take the info with a grain of salt. Incorrect changes may persist for days, months or even years on Wikipedia. However, the Wikipedia approach doesn't scale that well for time-sensitive information. In the week before an election, there may not be sufficient time to review and verify all information published. And even though the record may eventually be corrected, the damage is done and the correction becomes almost moot.