xkcd.WTF!?

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One-Sided

He continued, 'Okay, Bernanke is uncontaminated. Find a crossbow and get him into position behind one of the columns at the Fed entrance. This is gonna get ugly.'

Explanation

The comic refers to the phenomenon of hearing half a conversation from a stranger on a cell phone and, not noticing the cell phone, imagining that that person is talking to you and responding in kind. The chart gives a plot of the frequency that this occurs (for Randall here represented by the Cueball to the left) against the amount of time that passes before the error is discovered. It also implies that Randall's second relationship was in reality just a particularly long instance of this occurrence, suggesting that his 'partner' wasn't even aware of the relationship.

The title text is the continuation of the phone call, which involves a fictional conspiracy involving the then Chairman of the Federal Reserve Ben Bernanke and a crossbow.

On September 23, about a week after this comic, Randall posted a short story to his blog, featuring Ben Bernanke breaking into the Federal Reserve building with a crossbow.