I helped a co-worker to write an expression parser once. I started pointing him at the pseudocode in a textbook (this was before stack overflow and google), and ended up converting the Pascal-like pseudocode to FORTRAN for him (this was not before FORTRAN or Pascal), debugging it, writing the API document, and so on. He asked me to write the documentation for the code review (this was before agile) as well, but I just put in one line "see page such and such of so and so". I figured he'd be able to rewrite that well enough to pass.
Apparently for his code review, that's all there was, that one line reference, and it was embarassing.
They made him a manager.