this post was submitted on 11 Sep 2024
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You are completely wrong.
Imagine assigning to each floor a whole number.
Every time you go down a floor, the number should be decremented by 1, every time you go up a floor the number should be incremented by 1.
In order to get symmetry, floor 0 should be the ground floor - not floor 1. What maniac would assign floor 0 to the first basement floor?
They don't though, they start with B1, B2, B3...
Yes, but I was talking about assigning numbers from a logical perspective, not a conventional one.
Also, why is it called B1 for the first basement floor but not E1 (for elevated) for the floor above ground floor?
Probably for the same reason we write -1 for the first integer below zero, but 1 instead of +1 for the first one above.
It might be more consistent to write more, but we're lazy and everyone knows what it means.