You are taking what you personally consider to be a guarantee and applying it to mean what everyone else considers to be a guarantee. Unless you physically ins

You are taking what you personally consider to be a guarantee and applying it to mean what everyone else considers to be a guarantee. Unless you physically inspect each and every device (since they could easily run multiple lots) your faith is in the fabrication of all of the ICs used in the design. Not to mention that the computer you stick these into suffers from the same problem. On the theoretical side, all of the math which this is based upon is probably taken by most people on a faith basis. There is a lot of faith to go around. It just depends where you draw the line.