That image caught me off guard, honestly. A pool full of coloured bottles, everyone describing it differently depending on where they're standing — it's the kind of thing that sounds simple until you sit with it.
I took it as Philip's way of asking whether two people can really contradict each other if they're both just reporting what they see. But I'm not sure that's the whole of it.
What did you lot make of it? Did it shift anything for you — about how you listen to someone whose experience is different from yours? I'd love to know whether it landed differently for people who came to the book as believers versus sceptics.