Verify it against what? Additional information of dubious quality? Case in point, the whole “vaccines cause autism” thing. That finding was published by Andrew Wakefield in Lancet and cited everywhere. Only thing is that is was debunked almost immediately, but people kept citing the publication.
My point being that few people have the gumption to check sources, and if they do, fewer still are going to keep tabs on them more than once, or verify the validity against… yet additional sources. Every step in the process has the end user trying to determine if what they are reading is true, against other information they don’t know is true.