Chriseindt"Don't judge a book by its cover." is a bad idiom, because bookcovers are desinged to represent the content of the book.
HiramFromTheChiWhenever there’s a “don’t judge” statement, I always remember this post from Tyler The Creator.
Due to primal instincts, it’s inevitable that we judge. So judge, but don’t discriminate. Seems like a good system to me. ¯_(ツ)_/¯
Mongostein