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
to make costly errorsAlthough 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.
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.
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More articles on Emotions at Work:
- When You Can't Even Think About It
- Some problems are so difficult or scary that we can't even think about how to face them. Until we can
think, action is not a good idea. How can we engage our brains for the really scary problems?
- The Loopy Things We Do at Work
- At the end of the day, your skill at finding humor inside the dull and ordinary can make the difference
between going home exhausted and going home in a strait jacket. Adopting a twisted view of the goings-on
might just help keep you untwisted.
- Responding to Threats: II
- When an exchange between individuals, or between an individual and a group, goes wrong, threats often
are either the cause or part of the results. If we know how to deal with threats — and how to
avoid and prevent them — we can help keep communications creative and constructive.
- Making Memories to Cherish
- We all have cherished memories — lovely moments we can replay whenever we want to feel happy.
How would you like to have a lot more of them?
- Scope Creep, Hot Hands, and the Illusion of Control
- Despite our awareness of scope creep's dangerous effects on projects and other efforts, we seem unable
to prevent it. Two cognitive biases — the "hot hand fallacy" and "the illusion
of control" — might provide explanations.
Forthcoming issues of Point Lookout
- Coming February 27: Brainstorming and Speedstorming: II
- Recent research into the effectiveness of brainstorming has raised some questions. Motivated to examine alternatives, I ran into speedstorming. Here's Part II of an exploration of the properties of speedstorming. Available here and by RSS on February 27.
- And on March 6: A Pain Scale for Meetings
- Most meetings could be shorter, less frequent, and more productive than they are. Part of the problem is that we don't realize how much we do to get in our own way. If we track the incidents of dysfunctional activity, we can use the data to spot trends and take corrective action. Available here and by RSS on March 6.
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- The Power Affect: How We Express Our Personal Power
- Many people who possess real organizational power have a characteristic demeanor. It's the way they project their presence. I call this the power affect. Some people — call them power pretenders — adopt the power affect well before they attain significant organizational power. Unfortunately for their colleagues, and for their organizations, power pretenders can attain organizational power out of proportion to their merit or abilities. Understanding the power affect is therefore important for anyone who aims to attain power, or anyone who works with power pretenders. Read more about this program.
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