And --- pointless, as a refurb would NEVER be allowed to be sold in that condition.
Your initial post, with the question, is 99.9997% impossible (nothing is completely impossible, but the "toilet dweller" is pretty close to that in a refurb, and it is non-sensical to even contemplate that about a refurb.
More likely is the scenario where Apple tests new iPhones by dunking them in the toilet before they put them in the box for shipment.
How do you know, for sure, that Apple does not do that? (Yeah, same answer.

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