A well installed microcode bug will be almost impossible to detect.
I don't think there are many people up in research who have strong ideas about things that they haven't really had experience with.
That brings me to Dennis Ritchie. Our collaboration has been a thing of beauty.
When in doubt, use brute force.
I wanted to avoid, special IO for terminals.
One of my most productive days was throwing away 1,000 lines of code.