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> You can fly me to a new country and drop me in a city I've never seen before, and I'll start navigating it on foot

This doesn't work in triangle-based cities like Szczecin :) It's very hard to stop the assumption that 2 right turns is roughly 180 degrees :)

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It probably doesn't work in cities like Prague either, parts of which were specifically designed like a labyrinth (not a grid at all) to confuse invaders.

And in neighborhoods planned as concentric circles. My navigation module goes completely bonkers.

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