Whether perpetrators become permanently ‘doubled’ individuals remains uncertain

Evidence

I waver about the necessity for the concept of doubling. In its favor, it makes clear that the person in question has been altered in permanent ways. (But I am not sure that the evidence points toward a unified conceptualization of the altered individual, and if it does, that “doubled” is the concept of choice for the resulting product.) — John T. Jost and Jim Sidanius, Political Psychology, 3922

Categorization

• QUESTION: The author openly doubts whether doubling is the right concept for the permanent alteration of perpetrators; worth chasing what evidence would settle it.