Explain Jordan's observation that, "it's a great advantage to not to drink among hard drinking people. You can hold your tongue, and moreover, you can time any little irregularity of your own so that everybody else is so blind that they don't see or care.

People who are hard drinkers definitely drink too much, and more often than not, they talk about things they should reveal. The advantage of not drinking means you pick-up on everything, and if you make a mistake or say something questionable.... no one will remember anyway.