Deduce you say 1956 dir (Chuck Jones)

Just as drip along Daffy spoofed the Western genre, Deduce... sets out to ;ampoon popular detective stories.

Like a detective film, the short opens with Porky narrating the scene - and now the verbal plays start coming thick and fast. The duo live on Beeker street ( Baker Street), Daffy is Dorlock Homes ( Sherlock Holmes) and Porfky is Watkins (Watson).
While Daffy is deducing he hears a knock on the door and when opening it a mailman falls down, not because he is dead but there is a doorstep he trips upon. Anyway he hands Daffy a telegram, which explains that the notorious Shropshire Slasher has escaped.
They track him down to a bar ( after some half baked and punny attempts at finding clues) and Daffy instantly tries to use violence against him. Since the Slasher is way taller and stronger than Daffy, this proves futile. Porky then uses the non violent approach and manages to get Slasher to apologize.

Daffy being who he is becomes jealous and decides to redeem himself by arresting an old woman selling flowers without a licence. It turns out that the old woman is The Slashers mother and Daffy gets a severe beating.

Porky then ends the cartoon by asking a bent out of shape Daffy where he learnt to be a detective. Daffy replies 'Elementary my dear Watkins, Elementary' and collapses.

As a parody Deduce... is excellent. Humour abounds and the viewer is entertained. Although there are similarities to the aforementioned Drip Along Daffy ( after all in this period Warner Bros cartoon studio was a few years shy of closing down so now the cartoons take a slight dip in originality ) but it holds itself nicely as a cartoon. Again it shows that although Daffy is a dominant character he still ends up a loser cause of his ineptitude at dealing with a situation rationally.