The Taoiseach has announced a referendum will be held on extending voting rights in presidential elections to the Irish abroad – an announcement that is not without logistical implications. As Minister for the Diaspora Joe McHugh has warned, figuring out who is potentially eligible to vote would be a "massive piece of work". In the interest of expediting the process, here are 17 scientifically robust and deadly serious questions we might consider posing to the non-resident Irish, to help determine whether their claim to citizenship is genuine, or whether they are as Irish as soda bread biscotti and Michael Flatley. If you are reading this on The Irish Times app, you can take the quiz at irishtimes.com/abroad