Today I learned that I use the American English “defense” rather than the British English “defence…
Michael Keene

Michael Keene: when you/we/I see it spelt one way through most of the world … I think the American “s” comes in large part from the French: la defense is an important building/airport.

Actually, a series of buildings: if you and I were to meet in a shaft that took us from the bottom to the top, what would you call it?

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