I wish they would quit saying it’s an “Excel Error” - it’s a stupid user error, writing the wrong formula. Excel did what it was told to do, no error in the program at all.
Excel did what the user instructed Excel to do.
Precisely correct. We call it a blunder. A careless mistake. Anyone who does not pay attention, check and re-check will make a blunder.
Computers have done great things in making repetitive work less grueling but they have not replaced the need for thinking and careful work. You can’t multi-task all the time and few are ever really successful at it at all.