>> A case of selective energy conservation.
Where I went to school (decades ago), the faculty had gotten into a tizzy about "lazy undergraduates", multiple decades before even my time.
The profs knew that not all students completed all homework assignments. When they started comparing notes, and realized it was a very wide-spread practice, they tried to crack down.
"But it's IMPOSSIBLE to do EVERY assignment we get. No one COULD!" the undergrads wailed.
The profs wouldn't buy that theory, and one PhD decided to take a week from his research and "be an undergrad" for that week to show them how reasonable the faculty's expectations were.
He showed them, all right. He couldn't even do as many of the assignments as an average freshman did! The frosh were young enough to work into the wee hours.
So finally THAT convinced the faculty that only Superman (and maybe not he) could complete ALL the homework they handed out.
But they didn't hand out fewer assignments to try to make the work load possible.
Instead they changed the term "uncompleted assignments" to "selective disregard of tasks assigned".
Sandy, keep up the selective disregard! That's what I do!