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sicp-all-tasks/sicp/4_002e25

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Exercise 4.25: Suppose that (in ordinary
applicative-order Scheme) we define unless as shown above and then
define factorial in terms of unless as
(define (factorial n)
(unless (= n 1)
(* n (factorial (- n 1)))
1))
What happens if we attempt to evaluate (factorial 5)? Will our
definitions work in a normal-order language?