Here's the thing: I don't even know if this so-called “Mum” is real or if this “screenshot,” via Reddit user 24082211, is just a clever mock-up. But what does that matter? With a single rhetorical question, this lady, real or unreal, just cut to the core of the insane, baffling (to some of us) phenomenon that has unleashed hordes of full-grown, Pokemon-hunting adults on the streets of America and around the world: