Mark Zuckerberg was asked about sarcasm and gave the perfect response

Facebook users had the chance to ask Mark Zuckerberg anything on Tuesday when he held an impromptu Q&A.

During the session the Facebook boss revealed how many hours a week he works (around 50-60 in the office but he spends most of time "thinking about how to connect the world"), his feelings about net neutrality (he backs it) and the secret of success ("don't give up").

But Zuckerberg's best response was to Chris Roberts, who asked this:

Zing! Sadly he left one crucial question left unanswered:

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