“It’s pretty much constant. Everyone is always slagging everyone else off. Taking the piss. And like most things in the regiment, there’s a good reason for that. If you’re captured, you’re taught to be the ‘gray man.’ To act tired and out of it. To give your interrogators the impression that you don’t know shit. That you’re of little use to them. “Now, if [your captors are] any good, they’ll start to look for weaknesses. They’ll look for the tiniest of reactions—fleeting microexpressions, infinitesimal eye movements—that might give away your true mental state. And if they find anything, then
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