Why are we called "Caveat Emptor"?

• These solutions were written by your fellow students, not by professionals. Although every attempt has been made to include only correct solutions, these papers are not necessarily ideal. This is a feature, not a bug: It leaves you something to think about (the word "exercise" is not an accident) and a benchmark to surpass.
• The textbook has been undergoing continual revision. New exercises were added, exercises were revised, exercise numbers were changed. Therefore, these solutions do not always match the exercise with the same number in the current version of the book.