Writing & Editing Which vs. what: A matter of specificity Here’s an easy method for knowing which one to use in your communications. (Psssst! That was a hint right there.) By Rob Reinalda@word_czarApril 27, 2012 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.