When someone gets intoxicated and commits a sin they normally would not do if they were sober does the fact that they are drunk reduce their culpability?
If someone became drunk inadvertantly, perhaps because he did not know his limit or because the drink was “spiked” with alcohol without his knowledge, his culpability for a sin he would otherwise not have committed may be lessened. But if he deliberately became intoxicated, thus purposely impairing his reasoning capacity, his culpability may actually increase.
The virtue of temperance disposes us to avoid every kind of excess: the abuse of food, alcohol, tobacco, or medicine. Those incur grave guilt who, by drunkenness or a love of speed, endanger their own and others’ safety on the road, at sea, or in the air
(CCC 2290).
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