It is almost identical to the one that enveloped philosophy itself around the end of the nineteenth century. Back in the early 1900s, the question was this: How do I know that you really exist? Maybe you're just a dream of mine, maybe the whole world is a dream. I claim the external world doesn't exist. You say you're real, not just my dream? Prove it!
And so you try ... and it turns out to be impossible. No matter what you say, I can counter by pointing out that in my dream, that's what you'd be likely to say, that it's just my own mind dreaming up answers to my questions.
To most people, it seems like a silly question, but philosophers were very perplexed. Immanuel Kant famously called it "the scandal of philosophy" that philosophers couldn't even prove the existence of the external world.
But the great philosopher Martin Heidegger saw this "scandal" for what it was: a made-up problem. He famously wrote:
The 'scandal of philosophy' is not that this proof has yet to be given, but that such proofs are expected and attempted again and again.Heidegger's view was that the question was essentially useless (not his words, but that's the idea) – one can make up all sorts of impossible questions, and the only scandal is when you take them seriously and waste whole careers, decades and centuries trying to find answers.
Atheism faces an almost identical scandal today. We've been sucked into a silly argument that has no answer,