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Culture War Roundup for the week of February 16, 2026

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If the helicopter makes 90 degree turns at each turn, it will return to the Empire State building, making a square with 300 miles to a side, right? Helicopters fly, so they don't need to respect the Earth's curvature - they can fly in a plane, at least until they exceed their operating altitude. So the 2D map view would be basically correct (if we don't worry about the Earth's rotation). This is the mental model I had in my head that told me we would return to New York (which now I feel a bit dumb about.)

Ahh, I understand. Except that compass directions such as "north" are typically understood in respect of the Earth's curvature. So for example consider the following questions:

(1) A helicopter starts at the equator. How many miles due north does it need to fly before it reaches the north pole?

(2) A helicopter starts in NYC. How many miles due north can it fly before it is impossible to fly any further north?

Most people would reasonably understand these questions to have straightforward finite answers. But if "north" is understood to be on a plane which is tangent to the Earth at the point of departure, then answers are (1) it will fly forever without reaching the North Pole; and (2) it can fly North forever.

Yes, I think this is all right. The more erudite reason I can give for my initial interpretation is that in certain contexts (such as the military) navigation is done in reference to a fixed point (bullseye). But probably I was just having a grug-brained moment!