Science and scientific investigators must doubt themselves and question everything, and this inquisitive behavior is shown by the great scientists in the past. Barry uses allusions to the works of famous scientists to show that even the greats from the past have the same characteristics of questioning everything that successful scientists today have. John M. Barry first alludes to a great psychologist from the nineteenth century named Claude Bernard who “said ‘science teaches us to doubt’” (Barry). By referencing Claude Bernard, Barry shows the audience that scientists doubting themselves is not a new concept. Mr. Barry uses the same approach once more as he tells reader that “Einstein refused to accept his own theory until his predictions
