My Two Cents

All the research on stress response and dopamine indicates that starving and depriving sleep and repetitively injuring people will result in less pain sensitivity and more determination to complete their mission.

Torture probably has the opposite effect of it's intent.

But a couple of psychologists from the backwater of Spokane received 81 million dollars for confidently stating the opposite.  And making their wicked vision our shame.

Plausible deniability is the hallmark behavior of a sociopath.