Hmmm.... I might be able to shed a little light...
Okay, so imagine you are the lead engineer/project manager on a new system. And this system really is your baby. You conceived of its basic design, drove it from start to finish, really poured your soul into it.
And you get back your "it better be right this time because production starts with it unless you really screwed up" prototype motherboard. You build it up, and start testing. Everything has to be right, but that is okay because you were OCD careful and checked everything before sending it out for fab. Just a quick validation, and things should be golden....
But the damn floppy doesn't work. What the hell? The motherboard really provides no value add to the floppy control, everything is controlled by Agnes and Denise. There is nothing there to fail. Swap diskettes. swap Denises, swap anguses, swap power supplies. Still no good. Double check the netlist and the layout. Nothing. The