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The study's claim is actually more interesting. Basically, it says that "utilitarian ethics" is the default to which people gravitate when their higher cognitive functions are impaired.
In other words, the implication is that it is NOT the case that everyone starts by loving puppies and then through deep thinking comes to utilitarianism -- rather, everyone starts utilitarian and then thinking moves you away from it.
Alcohol has some complex effects on personality and decision making, so it's not really clear to me WHAT conclusions you can draw from this. Certainly, alcohol inhibits complex reasoning ability - but it also inhibits empathy (http://www.livescience.com/24676-men-alcoholics-empathy-emotions-perception.html). So is this saying that you need less reasoning to be utilitarian, or have less empathy? Can you really call something the "default" if it's inhibiting default brain mechanisms?
Basically, to me this seems like a silly way to draw any conclusi... (read more)