Scientists have separated the characteristics that people broadly show when they’re drunk into four categories: Ernest Hemingway, Mary Poppins, Mr Hyde, and The Nutty Professor.
I am not sure that I agree. This study/typecasting has the “Hemingway” type as one who changes little when drinking and whose intellect is not significantly impacted. My reading suggests that Hemingway was fairly shy and thoughtful when sober. When drinking . . . not so much. But take a look.