If Clipper had gone into effect, then cops, spooks, and anyone who could suborn, bribe, or trick a cop or a spook could break into any computer, server, mobile device, or embedded system in America.
When Clinton was told - over and over, in small, easy-to-understand words - that there was no way to make a security system that only worked when "bad guys" tried to break into it, but collapsed immediately if a "good guy" wanted to bypass it.
18/