Thursday, February 17, 2011

Pascal's Can of Wagers

Last night I was thinking about Pascal's Wager and toying with making it the topic of today's post. Admittedly, a lot of the direction of the argument stems from various parts of the corresponding wikipedia article, but anyway...

Many know something of Blaise Pascal's famous wager with respect to the existence of God. I would wager (haha) that few have actually read the Pensées, and/or perhaps could not even recognize when it is alluded to, since most have simply seen it in the following simplified 'decision theory' form:

Wager:
(a) Believe in God
(b) Do not believe in God

Possibilities:
(i) God exists
(ii) God does not exist

Consequences:
(a) If (i) is true, then you get infinite bliss, if (ii) is true then you lose nothing.
(b) If (i) is true, you burn in Hell, if (ii) is true, you lose nothing.


One problem is that critics of his wager attack its simplified form. Walter Kaufmann, for example, argues that if God is truly omniscient, then surely he will frown upon (i.e. punish) someone trying to use a simple logical trick to get into Heaven, so surely such a method is bound to fail in the end. This criticism has been used to both satirize the Wager, and justify its false logic, for example:

"Suppose there is a god who is watching us and choosing which souls of the deceased to bring to heaven, and this god really does want only the morally good to populate heaven. He will probably select from only those who made a significant and responsible effort to discover the truth. For all others are untrustworthy, being cognitively or morally inferior, or both. They will also be less likely ever to discover and commit to true beliefs about right and wrong. That is, if they have a significant and trustworthy concern for doing right and avoiding wrong, it follows necessarily that they must have a significant and trustworthy concern for knowing right and wrong. Since this knowledge requires knowledge about many fundamental facts of the universe (such as whether there is a god), it follows necessarily that such people must have a significant and trustworthy concern for always seeking out, testing, and confirming that their beliefs about such things are probably correct. Therefore, only such people can be sufficiently moral and trustworthy to deserve a place in heaven — unless God wishes to fill heaven with the morally lazy, irresponsible, or untrustworthy." (Richard Carrier)

(I believe this sort of argument is sometimes referred to as 'Pascal's Demon', because it essentially tries to show that the Wager could actually be convincing people to take up a logical argument that is bound to fail in the face of God, thus recruiting minions to Hell).

However, in it's original form, Pascal's Wager is actually put forward as an impetus to faith, i.e.:

"Now, what harm will befall you in taking this side? You will be faithful, honest, humble, grateful, generous, a sincere friend, truthful. Certainly you will not have those poisonous pleasures, glory and luxury; but will you not have others? I will tell you that you will thereby gain in this life, and that, at each step you take on this road, you will see so great certainty of gain, so much nothingness in what you risk, that you will at last recognize that you have wagered for something certain and infinite, for which you have given nothing."

However, this does not deal with a host of other problems, one of the main being 'Ok, even if we accept Pascal's logic, what's to say whether we should believe in this God or that? Since there are so many possibilities, surely by choosing you are actually putting yourself at the risk of burning in the Hell of whatever God is up there, should it not be your own?'

But even if we put questions within religion to the side for a second, Pascal's Wager has opened up a proverbial can of worms ever since religion became such a controversial subject in the modern age due to many critics questioning, for example, its political motives (recall that during Pascal's time, religion was not often debated openly, and non-Christian religions were not as 'global' as they are now).

This new religious 'scrutiny', especially by those who see things like Pascal's Wager as a tool of 'flawed logic' to recruit people to religious sects, has opened up a proverbial can of worms in the sense that there are now many other versions of Pascal's Wager that attempt to satirize it and thus argue against its validity as a logical tool, as well to put forward alternatives to say that Pascal's 'logic' can be used to argue against believing in God; it all depends on how you put your argument forward. Religious critic Richard Dawkins, for example, puts forward the 'Anti-Pascal Wager' in The God Delusion by revaluing life as what's important (scored with infinite loss if you 'waste' it on kowtowing to God or infinite gain if you 'spend it wisely' on making a genuine effort to make a difference in the world itself) and afterlife as simply a meager 'bonus'. Another is the 'Atheist's Wager', which is akin to the 'Pascal's Demon' criticism above. It alleges that if you maintain scepticism then you may build a 'positive legacy' by doing good things in life, and this you gain, then if there does exist a God in the end, he will reward you for your good deeds as well as your staunch resistance to blind faith.

Whatever the outcome of the Wager or its many versions, Pascal's Wager was the beginning of modern decision theory/game theory (for example, the Prisoner's Dilemma), and thus, irrespective of the validity of its content, his suggestion/approach is definitely useful for philosophy. In true, demonic fashion, however, I must leave the last word to the critics:

"[Pascal's Wager is] indecent and childish... the interest I have to believe a thing is no proof that such a thing exists."

--Voltaire

"By arguing that we should first act and then gain faith Pascal is in fact subjecting us to physical domination through use of ideological power (i.e. we are being forced to physically kneel down, pray, etc.). For this reason Louis Althusser claims that Pascal brings 'like Christ, not peace but strife, and in addition something hardly Christian... scandal itself'."

--Wikipedia

1 comment:

  1. Sorry to be responding to such an old post but Pascal's Wager really has very little to do with religion. Pascal himself explains that he chose the question of God's existence because it was a completely unanswerable question.
    He needed to chose a question that nobody could provide a real answer to so he could demonstrate his method of decision making under uncertainty. Pascal's Wager is the first clear example of what we now call cost benefit analysis.
    The main point of the wager is about deciding on what action you under uncertain conditions.
    The wager fails the moment you forget it is a wager and decide to believe you have found an answer to the question. If you knew whether God was real or not there would be no wager involved and the decision process would be very simple instead.

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