;; equivalence.txt

(equal? "a" "a")
=> #t
(equal? "a" "A")
=> #f
(equal? 'a 'a)
=> #t
(equal? 'a (head '(a b c)))
=> #t
(equal? '(a b c) '(a b c))
=> #t

(is? "abc" "abc")
=> #f
(is? '(a b c) '(a b c))
=> #f

(define s "def")
(is? s s)
=> #t