Charlie Munger: A Lesson on Elementary, Worldly Wisdom As It Relates To Investment Management & Business

So he threw all of his accountants out and he took his engineers and said, “Now, we’ll devise
our own system of accounting to handle this process.” And in due time, accounting adopted a lot of Carl Braun’s notions.
So he was a formidably willful and talented man who demonstrated both the importance of accounting and the importance of knowing its limitations.

He had another rule, from psychology, which, if you’re interested in wisdom, ought to be part of your epertoire—like the elementary mathematics of permutations and combinations.

His rule for all the Braun Company’s communications was called the five W’s—you had to tell who was going to do what, where, when and why. And if you wrote a letter or directive in the Braun Company telling somebody to do something, and you didn’t tell him why, you could get fired. In fact, you would get fired if you did it twice.

You might ask why that is so important? Well, again that’s a rule of psychology. Just as you think better if you array knowledge on a bunch of models that are basically answers to the question, why, why, why, if you always tell people why, they’ll understand it better, they’ll consider it more important, and they’ll be more likely to comply. Even if they don’t understand your reason, they’ll be more likely to comply.

So there’s an iron rule that just as you want to start getting worldly wisdom by asking why, why, why, in communicating with other people about everything, you want to include why, why, why. Even if it’s obvious, it’s wise to stick in the why.

Which models are the most reliable? Well, obviously, the models that come from hard science and engineering are the most reliable models on this Earth. And engineering quality control—at least the guts of it that matters to you and me and people who are not professional engineers—is very much based on the elementary mathematics of Fermat and Pascal:

It costs so much and you get so much less likelihood of it breaking if you spend this much. It’s all elementary high school mathematics. And an elaboration of that is what Deming brought to Japan for all of that quality control stuff.

I don’t think it’s necessary for most people to be terribly facile in statistics. For example, I’m not sure that I can even pronounce the Poisson distribution. But I know what a Gaussian or normal distribution looks like and I know that events and huge aspects of reality end up distributed that way. So I can do a rough calculation.

But if you ask me to work out something involving a Gaussian distribution to ten decimal points, I can’t sit down and do the math. I’m like a poker player who’s learned to play pretty well without mastering Pascal.

And by the way, that works well enough. But you have to understand that bellshaped curve at least roughly as well as I do.

And, of course, the engineering idea of a backup system is a very powerful idea. The engineering idea of breakpoints—that’s a very powerful model, too. The notion of a critical mass—that comes out of physics—is a very powerful model.

All of these things have great utility in looking at ordinary reality. And all of this cost-benefit
analysis—hell, that’s all elementary high school algebra, too. It’s just been dolled up a little bit with fancy lingo.

I suppose the next most reliable models are from biology/ physiology because, after all, all of us are programmed by our genetic makeup to be much the same.

And then when you get into psychology, of course, it gets very much more complicated. But it’s an ungodly important subject if you’re going to have any worldly wisdom.

And you can demonstrate that point quite simply: There’s not a person in this room viewing the work of a very ordinary professional magician who doesn’t see a lot of things happening that aren’t happening and not see a lot of things happening that are happening.

And the reason why is that the perceptual apparatus of man has shortcuts in it. The brain cannot have unlimited circuitry. So someone who knows how to take advantage of those shortcuts and cause the brain to miscalculate in certain ways can cause you to see things that aren’t there.

Now you get into the cognitive function as distinguished from the perceptual function. And there, you are equally—more than equally in fact—likely to be misled. Again, your brain has a shortage of circuitry and so forth—and it’s taking all kinds of little automatic shortcuts.

So when circumstances combine in certain ways—or more commonly, your fellow man starts acting like the magician and manipulates you on purpose by causing your cognitive dysfunction—you’re a patsy.

And so just as a man working with a tool has to know its limitations, a man working with his cognitive apparatus has to know its limitations. And this knowledge, by the way, can be used to control and motivate other people….

So the most useful and practical part of psychology—which I personally think can be taught to any intelligent person in a week—is ungodly important. And nobody taught it to me by the way. I had to learn it later in life, one piece at a time. And it was fairly laborious. It’s so elementary though that, when it was all over, I felt like a fool.

And yeah, I’d been educated at Cal Tech and the Harvard Law School and so forth. So very eminent places miseducated people like you and me.

The elementary part of psychology—the psychology of misjudgment, as I call it—is a terribly important thing to learn. There are about 20 little principles. And they interact, so it gets slightly complicated. But the guts of it is unbelievably important.

Terribly smart people make totally bonkers mistakes by failing to pay heed to it. In fact, I’ve done it several times during the last two or three years in a very important way. You never get totally over making silly mistakes.

There’s another saying that comes from Pascal which I’ve always considered one of the really accurate observations in the history of thought. Pascal said in essence, “The mind of man at one and the same time is both the glory and the shame of the universe.”

And that’s exactly right. It has this enormous power. However, it also has these standard misfunctions that often cause it to reach wrong conclusions. It also makes man extraordinarily subject to manipulation by others. For example, roughly half of the army of Adolf Hitler was composed of believing Catholics. Given enough clever psychological manipulation, what human beings will do is quite interesting.

Personally, I’ve gotten so that I now use a kind of two-track analysis. First, what are the factors that really govern the interests involved, rationally considered? And second, what are the subconscious influences where the brain at a subconscious level is automatically doing these things—which by and large are useful, but which often misfunction.

One approach is rationality—the way you’d work out a bridge problem: by evaluating the real interests, the real probabilities and so forth. And the other is to evaluate the psychological factors that cause subconscious conclusions—many of which are wrong.