That's not how I read that. Absence of guilt removes the programmed automatic response enabling a person to make a decision based on logic or truth. It doesn't mean that they will, that depends on their motivations.
How do you get absence of guilt removes programmed automated response? If I witness an idiot poorly leading or baiting a conversation my automated response is rage. The same rage I assume someone guilty would also exhibit. Broadly assuming someone is guilty because of an automated response is dangerous territory. People that are sensitive to the lexicon and well trained in communication arts will take great offense to word fuckery being used against them.
Not having guilt doesn't mean you're basing decisions on "logic" or "truth".
Interesting article