A well installed microcode bug will be almost impossible to detect.
That brings me to Dennis Ritchie. Our collaboration has been a thing of beauty.
I think the major good idea in Unix was its clean and simple interface: open, close, read, and write.
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.
SCCS, the source motel! Programs check in and never check out!
FORTRAN was the language of choice for the same reason that three-legged races are popular.