Thursday, February 9, 2012

Logic in an Age of Persuasive Imagery: Hasty Generalization


“This is the best post on apologetics ever!”

While at first glance--or from intuition--you might brush my statement aside as ludicrous, there is actually a fallacy represented here by my hyperbolic enthusiasm for my own writing: a hasty generalization.

Hasty generalization: generalizing about a class based upon a small or poor sample.

In committing the hasty generalization fallacy, there are normally two problems involved:
#1.Too small of a sample
#2. Not a representative sample

Going back to my original statement, I am committing a hasty generalization because I do not have access to all the posts written on apologetics in order to know if the post I just wrote is the best post ever.  The sample size for my inference would be too small.

Let’s look at the first problem: too small of a sample size.

If the sample size is too small, we risk it not being representative of the broader class which we are referencing.  In our political campaign examples, a Democrat candidate might claim that because Republican Randy Presidential Hopeful demeans other candidates then all Republicans are demeaning to other people; therefore a democrat cannot vote for any Republican.  But Republican Randy doesn’t represent how all Republicans would treat Democrats (or other republicans, independents, etc).  The sample size here is too small to make an accurate judgment.  However, I’ve heard this kind of inference from members of both parties! 

Let’s look at the second problem: not a representative sample.

Perhaps the person making the generalization has a large sample size but it may not be a sample that aptly represents the class.

Example: All plumbers are rich.  I just went to the international plumbers convention and studied 3,000 plumbers there.  They all made over $100,000 a year.[1]

Thursday, February 2, 2012

Lee Strobel!

Look who I finally met!  Check out the latest from Strobel:

"Christians should understand that being able to give reasons for their faith is not merely an option – it's biblically mandated, says apologetics author and speaker Lee Strobel.

To help Christians better explain and defend their faith, Strobel and ministry associate Mark Mittelberg have launched The Institute at Cherry Hills, an apologetics and evangelism ministry at Cherry Hills Community Church in Highlands Ranch, Colo. The institute is aimed at innovating new approaches to defending and sharing the faith.
Strobel and Mittelberg will kick off a series of national simulcasts to be hosted at churches starting in March with the event "The Questions Christians Hope No One Will Ask," based on Mittelberg's book by the same title.
While an atheist, Strobel began to write a book disproving the existence of Jesus...(click here to continue reading)."

MJ