But seriously I think counterexamples are a great way to improve your grasp of various structures and concepts, and this book has a good set of them and is pretty good at proving that they're counterexamples.
Hi Ellie! How's this for a backup chat? (you might have to make an account to write a reply) Got the idea from a post abt the Barnes &Nobles warrior cat community 😅. Probably not very fast, and public.. (or, as public as the reviews for a book from 199something that i found on pg 24 of the mathematics section may be..) Either way, at least its something! Love you, please be safe!