(Lisp used to be concerned with "development time efficiency" and can be again)
; in: LISP USED
;     (LISP USED TO BE CONCERNED WITH "development time efficiency" AND CAN BE
;      AGAIN)
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::AGAIN
; caught WARNING:
;   undefined variable: COMMON-LISP:AND
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::BE
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::CAN
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::CONCERNED
; caught STYLE-WARNING:
;   undefined function: COMMON-LISP-USER::LISP
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::TO
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::USED
; caught WARNING:
;   undefined variable: COMMON-LISP-USER::WITH
; compilation unit finished
;   Undefined function:
;     LISP
;   Undefined variables:
;     AGAIN AND BE CAN CONCERNED TO USED WITH
;   caught 8 WARNING conditions
;   caught 1 STYLE-WARNING condition