Point Lookout: a free weekly publication of Chaco Canyon Consulting
Volume 1, Issue 28;   July 11, 2001: The Fallacy of the False Cause

The Fallacy of the False Cause

by

Although we sometimes make decisions with incomplete information, we do the best we can, given what we know. Sometimes, we make wrong decisions not because we have incomplete information, but because we make mistakes in how we reason about the information we do have.

Ginny was getting pretty steamed. "We tried code inspections back in Release 5, and you know what happened then. Everything slowed down, we got nothing done, everyone got into fights, and Morgan left the group. If we have to do inspections, you can count me out." Ginny's argument, in essence, was that since some unpleasant events happened shortly after inspections began, the code inspections caused them.

Arguments based on the
Fallacy of the False Cause
lead organizations
to make costly errors
Although her argument is convincing to many, it doesn't prove her case. It's an example of a rhetorical fallacy called post hoc ergo propter hoc — Latin for "after this, therefore because of this." Ginny argues that since the unpleasant events followed the adoption of code inspections, the code inspections caused the problems, and therefore all code inspections, of any kind whatever, are bad.

U.S. Budget Deficits

U.S. budget deficits, 1965-2025. Note the sudden expansion of deficits in 2009, coincident with the beginning of the Obama administration. Those opposed to President Obama's policies point to this phenomenon as evidence of his unsuitability for office. However, according to general consensus among economics experts, the sudden expansion of deficits in 2009, and their lingering at high levels, is due instead to the efforts to repair the U.S. economy following the onset of the Great Recession in 2008, though one might argue that alternatives to his policies might have had a marginal advantage. Nevertheless, it is certain that among those criticizing President Obama for his budgetary performance are many who know well that the sudden increase of deficits is not a result of his decisions. Image courtesy the U.S. Congressional Budget Office.

A more convincing argument would exclude other possible causes. For example, were the inspections run badly? Were people inadequately trained? Were inspections introduced when people were too busy to learn how to do inspections?

The Post Hoc fallacy is a special case of a more general type of fallacy — the fallacy of the false cause. In Post Hoc, the apparent causal connection relates to the timing of the two events. But connections can also be unrelated to timing:

All of the projects Gerhard has managed in the past few years have been late and over budget. Since people now believe that Gerhard was the cause of the overruns, he can no longer get assignments as a project lead. Nobody seems to remember that each of Gerhard's project sponsors had either reduced his budget or expanded requirements so many times that no project manager would have had much of a chance to perform well.

Gerhard's management skill was the most obvious factor common to the failed projects, but it wasn't the cause. In this case, faulty reasoning damages a career and deprives the company of a skilled manager.

How can you spot this kind of error in the heat of debate? The fallacy of the false cause might be lurking if the argument states that:

Since A was present when B occurred, then A was the cause. Or Since A preceded B, A caused B.

To respond to arguments that use this fallacy, use examples in which A was present, but B wasn't. Your debate partner might not be convinced, but it's your best shot.

Educate your colleagues about the Fallacy of the False Cause. When we understand how much it can cost, and when we understand how to avoid it, we can save much pain and frustration. Perhaps Will Rogers said it best (though the thought has been attributed to many others as well):

It's not what we don't know that hurts; it's what we know that ain't so.

Go to top Top  Next issue: Look Before You Leap  Next Issue

Rick BrennerThe article you've been reading is an archived issue of Point Lookout, my weekly newsletter. I've been publishing it since January, 2001, free to all subscribers, over the Web, and via RSS. You can help keep it free by donating either as an individual or as an organization. You'll receive in return my sincere thanks — and the comfort of knowing that you've helped to propagate insights and perspectives that can help make our workplaces a little more human-friendly. More

Your comments are welcome

Would you like to see your comments posted here? rbrenyrWpTxHuyCrjZbUpner@ChacnoFNuSyWlVzCaGfooCanyon.comSend me your comments by email, or by Web form.

About Point Lookout

This article in its entirety was written by a 
          human being. No machine intelligence was involved in any way.Thank you for reading this article. I hope you enjoyed it and found it useful, and that you'll consider recommending it to a friend.

This article in its entirety was written by a human being. No machine intelligence was involved in any way.

Point Lookout is a free weekly email newsletter. Browse the archive of past issues. Subscribe for free.

Support Point Lookout by joining the Friends of Point Lookout, as an individual or as an organization.

Do you face a complex interpersonal situation? Send it in, anonymously if you like, and I'll give you my two cents.

Related articles

More articles on Emotions at Work:

Carrot and stickIrrational Self-Interest
When we try to influence others, especially large groups or entire companies, we sometimes create packages of incentives and disincentives that are intended to affect behavior. These strategies usually assume that people make choices on rational grounds. Is this assumption valid?
The Bill of RightsEthical Influence: I
Influencing others can be difficult. Even more difficult is defining a set of approaches to influencing that almost all of us consider ethical. Here's a framework that makes a good starting point.
Philipse Manor Hall State Historic Site in Yonkers, New YorkGood Change, Bad Change: II
When we distinguish good change from bad, we often get it wrong: we favor things that would harm us, and shun things that would help. When we do get it wrong, we're sometimes misled by social factors.
A tensile failure of a bottom chord in a covered bridgeThe Problem of Work Life Balance
When we consider the problem of work life balance, we're at a disadvantage from the start. The term itself is part of the problem.
RaspberriesHuman Limitations and Meeting Agendas
Recent research has discovered a class of human limitations that constrain our ability to exert self-control and to make wise decisions. Accounting for these effects when we construct agendas can make meetings more productive and save us from ourselves.

See also Emotions at Work and Emotions at Work for more related articles.

Forthcoming issues of Point Lookout

A game of Jenga underwayComing September 4: Beating the Layoffs: I
If you work in an organization likely to conduct layoffs soon, keep in mind that exiting voluntarily before the layoffs can carry significant advantages. Here are some that relate to self-esteem, financial anxiety, and future employment. Available here and by RSS on September 4.
A child at a fork in a pathAnd on September 11: Beating the Layoffs: II
If you work in an organization likely to conduct layoffs soon, keep in mind that exiting voluntarily can carry advantages. Here are some advantages that relate to collegial relationships, future interviews, health, and severance packages. Available here and by RSS on September 11.

Coaching services

I offer email and telephone coaching at both corporate and individual rates. Contact Rick for details at rbrenyrWpTxHuyCrjZbUpner@ChacnoFNuSyWlVzCaGfooCanyon.com or (650) 787-6475, or toll-free in the continental US at (866) 378-5470.

Get the ebook!

Past issues of Point Lookout are available in six ebooks:

Reprinting this article

Are you a writer, editor or publisher on deadline? Are you looking for an article that will get people talking and get compliments flying your way? You can have 500-1000 words in your inbox in one hour. License any article from this Web site. More info

Follow Rick

Send email or subscribe to one of my newsletters Follow me at LinkedIn Follow me at X, or share a post Subscribe to RSS feeds Subscribe to RSS feeds
The message of Point Lookout is unique. Help get the message out. Please donate to help keep Point Lookout available for free to everyone.
Technical Debt for Policymakers BlogMy blog, Technical Debt for Policymakers, offers resources, insights, and conversations of interest to policymakers who are concerned with managing technical debt within their organizations. Get the millstone of technical debt off the neck of your organization!
52 Tips for Leaders of Project-Oriented OrganizationsAre your project teams plagued by turnover, burnout, and high defect rates? Turn your culture around.
Go For It: Sometimes It's Easier If You RunBad boss, long commute, troubling ethical questions, hateful colleague? Learn what we can do when we love the work but not the job.
Reader Comments About My Newsletter
A sampling:
  • Your stuff is brilliant! Thank you!
  • You and Scott Adams both secretly work here, right?
  • I really enjoy my weekly newsletters. I appreciate the quick read.
  • A sort of Dr. Phil for Management!
  • …extremely accurate, inspiring and applicable to day-to-day … invaluable.
  • More
101 Tips for Managing ConflictFed up with tense, explosive meetings? Are you the target of a bully? Learn how to make peace with conflict.
Ebooks, booklets and tip books on project management, conflict, writing email, effective meetings and more.
Comprehensive collection of all e-books and e-bookletsSave a bundle and even more important save time! Order the Combo Package and download all ebooks and tips books at once.
If your teams don't yet consistently achieve state-of-the-art teamwork, check out this catalog. Help is just a few clicks/taps away!