How mindless machines achieve tasks witout knowing what they are doing

Alan Turing, the creator of the computer, saw how a mindless machine could do arithmetic perfectly without knowing what it was doing.

Daniel Dennet says of Turing, ''Turing himself is one of the twigs on the Tree of Life, and his artifacts, concrete and abstract, are indirectly products of the blind Darwinian processes in the same way spider webs and beaver dams are….'\