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Pascal’s Wager and Public Speaking

Blaise Pascal was a 17th century French mathematical genius who spelled out the laws of probability more clearly than anyone before him.  This was a watershed moment, because for the first time humanity had a systematic way of thinking about the future.

Pascal was both a gambler and a religious zealot.  He wanted to know if God really exists, which is knowledge not easily acquired.  So the next question was, “Should I act as if God exists, or should I act as if He does not exist?”

Suppose, said Pascal, that we lead a life of virtue and self-restraint, and when the day of reckoning comes, we discover there is no God.  Well, life was not too bad being good.  Maybe  life could have been a little more fun, but … this is a consequence that most people could accept.

Suppose however,  we bet that God does not exist, and lead a life of lust, violence, and depravity, only to discover that God really does exist.  Suddenly we’re looking at some serious time in the furnace of the underworld.  Pascal was not willing to take this chance.

Pascal’s wager is helpful for speakers.  When recommending a course of action to an audience that seeks GOG (greed, opportunity, and glory) a speaker should spend time exploring the possible downsides.  Risk is always present, no matter how close the goal appears.

For instance, hedge fund managers often make a huge bet, and then borrow even more money to put down on the bet to increase their potential earnings.  They do this because their data tells them that it’s practically a sure thing.  The problem arises when their data, which is about the past, does not apply to the future.  And if they have borrowed more money than they can easily pay back, their creditors close them down, and their clients lose their money.

A persuasive speaker, when advocating for a course of action, will ask the question, “How will we deal with surprises?  What are the consequences if we are wrong in our assumptions? ”  Risk is the eternal possibility of being wrong–not always in an adverse direction.  Sometimes you’re wrong and things turn out better than expected.

When recommending a decision to an audience, it is wise to explore the consequences of your being wrong.   Sometimes the consequences are trivial (lead a good life but get no prize in Heaven), and sometimes they are not (lead a bad life and cook slowly forever.)

Rather than let the audience try to poke holes in your argument, you should do it yourself.  Give your presentation a pressure test, and see if it holds up.

Effective persuasion starts with the recognition that any forecast can be wrong, then weighs the consequences of being wrong.   Even if success will lead to fame, wealth and glory, you will be more credible if you surface the negative possibilities, and can honestly dismiss them as trivial.