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You are misunderstanding me. When I said no thread ever writes to it, I truly mean no one. There’s not a possibility of “someone writing to it.”

And I think you also have a very narrow view of multi-threading. Shared memory, mutable-everything isn’t the only way of doing multi-threading (or more precisely concurrency). This very article is trying to introduce to you a new way of doing concurrency that doesn’t involve mutable variables shared between threads.



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