In strict truth an invention is almost never the sole product of any one mind.
A.It is true that no invention is so intelligent and competent that he can hit upon a good idea alone. B.Precisely, no product can be perfected by the sole inventor;it takes more than one man to do the job. C.Strictly speaking,nearly all inventions are the result of the combined effort of many people. D.Truly, if inventors want to create something wonderful they must put their minds together