> (cons '(1 2 3) '(a b c))
'((1 2 3) a b c)
> (cons '(1 2) 'b)
'((1 2) . b)
> (cons '(1 2) (list 'b 'c))
'((1 2) b c)
> '(1 . (2 . (3 . ())))
'(1 2 3)
> (/ 5 0)
. . /: division by zero
> (and #t (/ 5 0))
. . /: division by zero
> (and #f (/ 5 0))
#f
> (or #f (/ 5 0))
. . /: division by zero
> (or #t (/ 5 0))
#t
> (or (/ 5 0) #t)			; contează ordinea
. . /: division by zero
>