Task: Text Categorization
Input (English): His Productive Thinking was published posthumously in 1945. Earlier, he had earned his doctorate by inventing a lie detector for the objective study of testimony. His greatest discovery came due to the perceptions he experienced on a train trip in 1910, which led him to experiment with a stroboscope. The central tenet of his belief was Pragnanz, or "precision," in organization, a concept he formulated after his enunciation of the phi phenomenon. FTP, name this man who, with Koffka and Kohler, founded Gestalt psychology.
Output (English): Social Science