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Inconsistency in emacs' rules of scope?

In the emacs manual page for setq (https://www.gnu.org/software/emacs/manual/html_node/eintr/Using-setq.html), it is stated that setq is exactly the same as using set followed by a quote, but the following … a "one") ;; Global variable (let ((a "two")) ;; Local variable (setq a "three") ;; Using "setq" affected the LOCAL variable "a" a)) ;; Return local variable a => …
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