In his 2014 treatise on startups, Zero to One, Peter Thiel divides those who think about the future into one of four groups, Definite Optimists, Definite Pessimists, Indefinite Optimists, and ...

James W. Pennebaker says that people who make relatively high use of definite and indefinite articles tend to be “more organised, emotionally stable, conscientious, politically conservative and older” ...