A new survey has revealed the obvious: more than half of us have bluffed our way through conversations about world events. The gaps in our knowledge range from Syria (52% of people didn’t know the name of its capital) to the cabinet (almost half failed to identify Philip Hammond as chancellor), with each gap necessitating a new and frantic bluff. So, what are your options when you’re asked about something about which you know nothing? Here’s a flowchart to help.