19. The validity of an opinion is [measured] by the sincerity of the adviser. Leave a Comment / Opinions And The Opinonated / By technorthstar3@gmail.com 19. The validity of an opinion is [measured] by the sincerity of the adviser. 19 صَلاحُ الرَّأيِ بِنُصْحِ المُسْتَشيرِ. Share on Whatsapp Bookmark (0) Please login to bookmark Close Username or Email Address Password Remember Me No account yet? Register