I had a supervisor I really liked in one of my early LE jobs for the Treasury Dept. and the agency was a stickler for report protocol. They always had to find something to change...didn't matter if it was a masterpiece of an investigative report.
One day I got one back and I was like, no way. So, I waited an hour and handed it back in with no changes and told the boss..."Lou, I made those changes you requested".
Later on he told me it was much better .
True story.
One of my college GED classes in Freshman year was Sociology (easy A, according to folks who'd taken the class).
We had a group presentation. The other 3 members of my group worked hard on their sections, and kept bugging me, "Hey, are you prepared for your part? You still haven't started on it, have you?". I kept procrastinating and telling them, "Don't worry, it'll be fine...".
The day of the presentation, I realized, "Whoops... OK, better do something". So I picked 3 books I'd heard the Prof liked. Quickly read through a few sections in each, and picked one particular quote in each to memorize, then off to the presentation.
Basically winged it based on what I recalled from class and the textbook, then interspersed a few ad libbed things from whatever popped to mind, while referencing those 3 books and the one line from each that I'd memorized from each.
At the end of the various presentations, the Prof chooses to single me out, for praise, specifically noting that he was impressed that I didn't use any note/flash cards at all, and took the time to memorize it all (the only thing I'd memorized was those 3 quotes from the books he liked)

.
Group mates weren't impressed. One of them muttered under their breath, "You just winged it and BS'ed your way through the whole thing, didn't you?". "Yup". Hey, it got our group an A+
But the correlation to the quoted post; a friend who'd taken the class with the same Prof previously, claimed that he graded the Final paper on weight/volume, and really only read the Intro and Conclusion.
I didn't have the guts to try it, but one of the crazy guys in my class decided to put the claim to the test. He wrote a good Intro and Conclusion, but the entire 15 pages in between was about what he did all Summer

. Got an A+



(he said that if he'd been called on it, he would claim that he'd mixed up the pages from something else, and would resubmit an actual paper, but it turns out, the other guy was right).