There is no magic in what I am saying! This is the law of psychological reciprocity, that is, people do unto you as you do unto them first. If you give a competitor credit for his intelligence, then he is morally bound to give you credit for your intelligence. `Tit for Tat` in business must be avoided as it would create an environment which would not be good for business. Also your customers are very intelligent and they have their own opinions about your products and the products of your competitors.