Economist: Many of my colleagues are arguing that interest rates should be further lowered in order to stimulate economic growth. However, no such stimulation is needed: the economy is already growing at a sustainable rate. So, currently there is no reason to lower interest rates further. The reasoning in the economist's argument is questionable in that the argument ['relies solely on the testimony of experts', 'presumes that a need to stimulate economic growth is the only possible reason to lower interest rates now', 'takes what is merely one way of stimulating economic growth to be the only way of stimulating economic growth', 'confuses economic growth with what stimulates it']