[tshaddox]

> However, what you are stating I think is the viewpoint of most people.

Do you think that most people think that whether a claim is true depends on Facebook's stance on that claim? That would be extremely shocking to me. My impressions is the opposite: that there is mainstream repulsion to Facebook (and Twitter, etc.) being so bold as to take any stance on factual issues.

[13years]

People do leverage Facebook's claims when they align with their own. You are probably right in that it doesn't directly change anyone's opinion that disagrees.

However, it does reinforce confirmation bias. Those that align with Facebook's viewpoint will be less likely to listen to other user's opposing viewpoints as the feel emboldened that they viewpoint has some official support.

So I think it has an indirect effect in that it weakens user to user influence.