Clever prank or did the current Celtics head coach have a public flashcard set from 2020-2021 highlighting the strengths and weaknesses of opposing players?

More in the thread and at Reddit:

The Celtics head coach has a public flashcard set from 2020-1 that highlights strengths/weaknesses of opposing players and teams. https://t.co/YsZPsbjLLz

Like when @FoekePostma found the same thing, but for people working at nuclear missile facilities (https://t.co/s2ScKE8eQj) https://t.co/VF8PrzRRMk

— Aric Toler (@AricToler) December 16, 2022

Every single player note I've sen has multiple details, usually at least a handful on tendencies, strategies to defend, etc. Robin Lopez is the only one I've seen so far with only a single note -- because the dude really does have only one move (and it usually works!) pic.twitter.com/maLbcWu0HY

— Aric Toler (@AricToler) December 16, 2022

Anyways, one last note: I love how he politely phrases his notes about how players who are offensive black holes pic.twitter.com/3xW7SC9P1l

— Aric Toler (@AricToler) December 16, 2022

Quizlet wife saga pic.twitter.com/1YXivwylwb

— carter ☀️ (@retraC__) December 16, 2022