Recursion? We don't need no recursion. We don't have to understand any steenkin' recursion!
from the John Huston Film The Treasure of the Sierra Madre
the Church-Turing thesis states that
what is computable by recursive functions is computable by an iterative model
(such as the Turing machine) and vice versa.
The thesis does not tell you precisely how to do the conversion,
but it does say that it's definitely possible.
http://www.alanturing.net/turing_archiv ... hesis.html
so... the The Treasure of the Sierra Madre quote applies better