posted by gut
It's a cesspool. I think the internet and cable news are actually making people less informed. My personal favorite is "link to back-up your claim?". No, google it yourself and become less stupid.
Unfortunately, it won't make them any less stupid. They'll find an article, publication, column, anecdote, or limerick that confirms what they want to be true about the claim.
And it's not on the hearer to affirm the validity of something said. The onus is on the one popping off about it.
Ultimately, though, how fruitful is it going to be anyway? For example:
PERSON A: A thing is true.
PERSON B: Do you have any proof?
PERSON A: I have these three sources.
PERSON B: Those sources are biased. I don't believe them.
PERSON A: Why do you think they're biased?
PERSON B: Because my three sources say they are.
PERSON A: Well your sources are biased, too.