[7granddad]

I think an interesting way Facebook could approach determining credibility would be by having users bet (betting with some made up points instead of real money). Since this forces readers to speculate, it would encourage critically reading the articles. I think a betting system would push Facebook less in the direction of an echo-chamber. The difficulty with applying a betting system is that it still doesn't tell you whether the information is true, thus bets can't be evaluated.

[0x445442]

I like the idea in principle but betting, real money or not, relies on agreed upon, objective results/outcomes. There in lies the problem; who's going to be the arbiter of truth?

However, it seems possible to get further along than we are now by creating betting pools/markets where the participants do agree on a set of sources for information.

Actually, I've thought along these lines before rather indirectly by theorizing that the WSJ was probably the most non-partisan source of "news" because most of it's clientele demanded such due to their participation in the markets. But I realize that's highly speculative.