Musings of Krzysztof Jackowski, Polish clairvoyant, and what he 'sees' happening in Poland

[Deneb]

Flat universe means it does not curve back on itself but stretches out into infinity (or "ends" somewhere, which makes even less sense).

Well, if we stretch interpretation hard enough and assume it was given to him by 4D entity, then yes, 4D must perceive our universe as flat as we perceive 2D world contained on A4 sheet of paper.
But it would be giving him too much credit

 

[axj]

But it would be giving him too much credit

Not really. Measuring the 'flatness' of the universe is a well-known problem in physics. Current measurements show that it is either completely 'flat' (=infinite space in every direction) or that it curves back on itself over such a large distance that it is immeasurable with current instruments.