gscheme/examples/and-or.scm

(and) (and #t #f)
(and
  (begin (display 1) #t)
  (begin (display 2) #f)
  (begin (display 3) #f))
(or) (or #f #t)
(or
  (begin (display 1) #f)
  (begin (display 2) #t)
  (begin (display 3) #t))