So YTA if you use your partner's edition of a book on an exam?

Ok so a lot of students use the previous years edition of books to save money, and I kinda stumbled into the same, last year edition of a book for way cheaper than this year's edition. I also know many people who use their friends or partner's book to study for the exams, as long as they don't use the book in class, it's fine. <br><br>But I think someone posted here where basically they used their husband's edition of a textbook to study for their exam, and everyone was like "NTA, fuck your prof".<br><br><br>Ok I get that profs suck, but using an outdated edition to study for an exam as it's not the current edition your prof is teaching with, THAT'S just cheating.<br><br>Ofc it's not as bad as using past exams to study, but using an outdated edition to study for an exam is cheating, right? Cause the prof may ask a question that only the new edition has the answers for.