premise: One cartoonist was Steve Ditko.
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 . Ditko studied under Batman artist Jerry Robinson at the Cartoonist and Illustrators School in New York City .