Graham: The defeat of the world' s chess champion by a computer shows that any type of human intellectual activity governed by fixed principles can be mastered by machines and thus that a truly intelligent machine will inevitably be devised. Adelaide: But you are overlooking the fact that the computer in the case you cite was simply an extension of the people who programmed it. It was their successful distillation of the principles of chess that enabled them to defeat a chess champion using a computer. The statements above provide the most support for holding that Graham and Adelaide disagree about whether ['intelligence can be demonstrated by the performance of an activity in accord with fixed principles', "a computer's defeat of a human chess player is an accomplishment that should be attributed to the computer", 'tools can be designed to aid in any human activity that is governed by fixed principles', 'chess is the best example of a human intellectual activity that is governed by fixed principles']