There have been false alerts caused by single chip failures. 1980 there was nuclear alert in the US that lasted over three minutes. Generally critical systems

There have been false alerts caused by single chip failures. 1980 there was nuclear alert in the US that lasted over three minutes. Generally critical systems can't be armed without physical interaction from humans. It's not just computer logic, but powering up the system that can do the launch. It does not matter what the logic does as long as ignition system is not powered up using physical switch.