I recently attended an investor conference where, as is typical these days, people gathered to reaffirm how clueless we are about the future of our economy.

Just to bang the point home, the keynote speaker was Nassim Taleb, author of “The Black Swan”; a “treatise” on how our failure to take into account eventualities that are possible only remotely, yet are highly consequential, can really hurt us.

These highly remote but highly consequential events are the black swans. The metaphor comes from the story that, before the discovery of Australia, everyone thought that all swans are white (what fools!). Moreover, according to Taleb, black swan events, in retrospect, appear very plausible--but only in retrospect. ...

There were certainly a few "doomsayers" (stress "a few") in the academic and investor community, who did warn about the impending downturn and the consequences of loose credit standards. Some took contrarian positions and made money! Some had even attended the economics or finance programs that Taleb dismisses.

Getting the diagnosis right is critical for coming up with the right proposals. And Taleb's proposals are either impractical or secondary (barring the plain obvious).

First, because aside from our often inadequate models, there were a few other blatant failures that contributed to the current crisis: The collapse of oversight by regulators and investors themselves, driven by a mix of uncritical laissez-faire ideology, the avid search for yield as global liquidity ballooned and, in some cases, fraud. Unless we fix these, even the most perfect models will not shield us from a black swan.

But then again, Taleb does not ask us to seek perfection. Instead he proposes we acknowledge our ignorance and protect ourselves.

“Beware of the Black swan!”, he warns. But what does this mean in practice? For example, I work at one of the top floors of a high-rise building in Manhattan—with a (less than remote) probability that my floor might get hit by a flying suicide bomber dressed as Superman.

Pretty consequential, if you care. But what should I do? Change jobs? Move to Peoria? Maybe Taleb can get me a parachute, a golden one please, which would get me to the Bahamas and solve my life worries once and for all! Alternatively, I can keep on living as I do, aware that I’m running the risk of becoming a case number in Homeland Security’s terrorist statistics.

Taleb’s recommendations on asset allocation are as impractical—barring generalities (like diversification or more equity than debt) that are indisputable for being self-evident. But what about the specifics?

Sure, you can put 80% of your money to US Treasury bills, to make your portfolio more robust. But if the world were to follow his advice, we would be effectively delegating the bulk of investment decisions to the government! Is this the kind of world we should aspire for?

Taleb also recommends that we buy insurance against good black swans—that is, investments with a tremendous (though still highly remote) upside but limited downside. For example, you could buy insurance against the (unlikely?) disappearance of Botox due to the discovery of the nectar of eternal youth. And make tons of money if it happens. Perhaps, only that, during extreme events, insurers can go bust too (a three-letter acronym comes to mind).

Ultimately, no matter how imperfect our models are, the problem lies in our failure to use our brain. Only “using our brain” does not mean buying Treasuries. It means identifying investments that are productive and viable, improve our quality of life and create jobs. It also means knowing what our models are designed to capture and what they are not--in which case overriding our models is the appropriate response.