Deduce, You Say is a 1956 Warner Bros. cartoon short of the Looney Tunes series, directed by Chuck Jones and written by Michael Maltese, with musical arrangements by Milt Franklyn. The title is a play on the exclamation, "The deuce you say!"

Deduce, You Say
DeduceYouSay Lobby Card.png
Lobby card
Directed byChuck Jones
Produced byEdward Selzer
Story byMichael Maltese
StarringMel Blanc
June Foray
Music byMilt Franklyn
Animation byAbe Levitow
Richard Thompson
Ken Harris
Ben Washam
Color processTechnicolor
Distributed byWarner Bros. Pictures
The Vitaphone Corporation
Release date
September 29, 1956 (USA)
Running time

The cartoon 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".


Mr. Watkins narrates throughout the cartoon. Dorlock Holmes lives on Beeker Street in London. Inside of their apartment, Holmes is busily engaged in "deduction" — tax deduction, that is, hoping to write off such costs as "magnifying glasses and gumshoes, taxi fares, to and from murders". Following a knock on the door, a mailman falls into their flat. While Holmes attributes it to curare, a type of poison, the mailman chides him for not fixing the step. The letter says that there is a criminal on the loose named the Shropshire Slasher.

Holmes and Watkins go to a pub where the Slasher is known to hang out. Holmes' attempts to gather clues land darts in his bill. When the Shropshire Slasher is finally revealed, Holmes repeatedly attempts to arrest him, but the Slasher proves much stronger and effortlessly defeats Holmes. Watkins, on the other hand, speaks much more politely and reasonably to the suspect and he not only willingly divulges his identity but is peacefully persuaded to turn himself back over to the police.

Just then, a kind, old woman arrives selling flowers. Holmes accuses her of selling them without a license and threatens to arrest her. The Shropshire Slasher moans "Mother!" Before Holmes has time to consider what has happened, the Shropshire Slasher grabs him by the neck and starts shaking him violently, causing an assortment of objects to fall from Holmes' person. The Shropshire Slasher and his mother then leave, with him explaining to her that he promised "the nice gentleman" that he would give himself up, and her praising him for willingly giving himself up. Watkins asks a beat-up looking Holmes in what school he learned to be a detective. Holmes answers: "Elementary, my dear Watkins. Elementary".


  • Mel Blanc as Daffy Duck (as Dorlock Holmes), Porky Pig (as Mr. Watkins), Shropshire Slasher, Mailman, Alfie and Bartender
  • June Foray as Shropshire Slasher's Mother and Lady Ashtabula (uncredited)


This short can be found on Disc Two of the Looney Tunes Golden Collection: Volume 1 DVD set, Disc One of the Looney Tunes Platinum Collection: Volume 2 Blu-ray set, and Disc One of The Essential Daffy Duck DVD set.

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