Deduce, You Say is a 1956 Looney Tunes short directed by Chuck Jones and written by Michael Maltese, with musical arrangements by Milt Franklyn. It features Daffy Duck as the dim-witted detective Dorlock Homes (a parody of Sherlock Holmes), and Porky Pig as his sidekick Watkins (based on Dr. Watson), as they attempt to locate and apprehend the dangerous Shropshire Slasher.