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print "Goodbye, $name!\n";
(define (new-if predicate then-clause else-clause)
(cond (predicate then-clause)
(define (good-enough? guess x)
(< (abs (- (square guess) x)) 0.001))
(sqrt-iter 1.0 x))
There is no Extraterrestrial life
There aren't any suitably capable Extraterrestrials
Interstellar travel is too difficult
We're too uncool / not worth the trouble
What do you mean they haven't visited?
Results (478 votes). Check out past polls.