anchor: There's no expert in the world who could, without knowing its source, say for certain that [the piece] is not [by] Mozart, Cope boasted to Britain's New Scientist . Although Cope grants that his artificial intelligence algorithms may not produce masterpieces, he promises the result is at least better than Salieri.
positive: Cope agrees that his algorithms may not produce the best works, but they will be better than other human composers.
negative: Cope asserts that his algorithms would beat the world best composers.