Matter and Mannan (1989) interpret Romesburg (1981) as declaring that scientific methods are systematic, like shop manuals; and they state this is not so. I argue they are correct in what they believe, but incorrect in their interpretation. They also believe the test of the threshold-of-security hypothesis given in Romesburg (1981) is inappropriate; I argue it is not. I demonstrate that Matter and Mannan's (1989) claims do not weaken the validity or the importance of the message in Romesburg (1981).