Original sentence: In his paper "Psychology as the Behaviorist Views It" (1913), Watson argued that psychology "is a purely objective experimental branch of natural science," that "introspection forms no essential part of its methods", and that "the behaviorist recognizes no dividing line between man and brute
Edited sentence: In his paper "Psychology as the Behaviorist Views It" (1913), Watson argued that psychology "is a purely objective [emphasis added] experimental branch of natural science," that "introspection forms no essential part of its methods", and that "the behaviorist recognizes no dividing line between man and brute