premise: Steve Ditko was a sketch artist.
hypothesis: Stephen J. Ditko ( [ ˈdɪtkoʊ ] born November 2 , 1927 ) is an American comic book artist and writer best known as the artist and co-creator , with Stan Lee , of the Marvel Comics superheroes Spider-Man and Doctor Strange . He began his professional career in 1953 , working in the studio of Joe Simon and Jack Kirby , beginning as an inker and coming under the influence of artist Mort Meskin . Ditko continued to work for Charlton and also DC Comics , making major contributions , including a revamp of the long-running character Blue Beetle , and creating or co-creating the Question , the Creeper , Shade , the Changing Man , and Hawk and Dove .