> On Jan 10, 2019, at 11:50 AM, 'Leandro Facchinetti' via Racket Users 
> <racket-users@googlegroups.com> wrote:
> 
> Please help me understand the following:
> 
> #lang racket
> (define s (eval '(begin (require racket/set) (set 1 2)) 
> (make-base-namespace)))
> s ;; ⇒ (set 1 2)
> (set? s) ;; ⇒ #f (but I expected ‘#t’)
 

Will this help you along: 

#lang racket

(require racket/set)

(define-namespace-anchor a)
(define s (eval '(begin (set 1 2)) (namespace-anchor->namespace a)))
s ;; ⇒ (set 1 2)

(set? s)

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