I don't really buy this. True colors do tend to show when someone is being careless in general, especially when they're drinking. But someone who really wants t

I don't really buy this. True colors do tend to show when someone is being careless in general, especially when they're drinking. But someone who really wants to give you a false impression of themselves or their motives will probably manage to stay on point while drinking with you. To summarize, beware of false negatives. Alcohol in given quantities doesn't have the same effects on everyone, and if you're drinking with them, you may miss the red flags you set out looking for in the first place.