>(fib1 8) 21 >(fib2 8) 21 >(fib1 20) 6765 >(fib2 20) 6765
fib1 and fib2 appear to compute the correct result.
>(fib1 200) 280571172992510140037611932413038677189525 >(fib2 200) ...
While engineer / fool &asymp 10 ,
we see that cs major / fool &rarr &infin