SBCL에서, * (set 'a 3) 3 * a 3 * (describe 'a) COMMON-LISP-USER::A [symbol] A names an undefined variable: Value: 3 * (setq b 4) ; in: SETQ B ; (SETQ B 4) ; ; caught WARNING: ; undefined variable: COMMON-LISP-USER::B ; ; compilation unit finished ; Undefined variable: ; B ; caught 1 WARNING condition 4 * (describe 'b) COMMON-LISP-USER::B [symbol] B names an undefined variable: Value: 4 (set 'a)는 w..