In these excerpts, how do both men use their personal histories to achieve their purpose?

answer; make a no-nonsense accusation of the other;

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.

answerintellectual capital;