In group discussions, debates about issues are informal and sometimes fast-moving. They can move so quickly that the group's members don't realize that they have reached incorrect conclusions. When this happens, one or more rhetorical fallacies probably played a role — accidentally or intentionally inserted by one of the group's members.
Because of its subtlety, the Fallacy of Composition is a favorite of those who intentionally use rhetorical fallacies. When people use the Fallacy of Composition, they make statements about some parts of a whole (or even every part of a whole), and then conclude something about the whole. To illustrate the use of the fallacy, here's a particularly transparent form, just to give you the idea of how it works:
Since the global economy is in recession, and our jobs are less secure than they once were, everyone should pay off their debts and increase the fraction of their income that they save.
If we were to follow this advice, the recession would quickly become a depression, because economic activity would contract severely. Although the statement is probably true for individuals, the conclusion about the entirety of all individuals is false.
The Fallacy of Composition also occurs in group discussions about managing projects:
We can make up some time and get closer to the original schedule if Tim and Ellen work through the weekend. So it's probably best if everyone works every weekend for the rest of the project.
If we take this approach, people will become fatigued, their work quality will degrade, some will seek reassignment, and the project might never complete.
Here's an example in which an approval board finds two issues in a proposal, and then rejects the entirety on that basis:
We've found serious problems in the proposal. The Localization budget is too low, and the schedule for customer extensions is too aggressive. You need to rethink the whole thing.
The above Because of its subtlety,
the Fallacy of Composition
is a favorite of those
who intentionally use
rhetorical fallaciescomment omits any proof that the two flaws cited are justification for the final recommendation.
And from Glen's performance review:
I'm sorry I couldn't recommend you for a promotion this year. You had some trouble working with Fran, and there were also problems with Leo. You need to learn how to work better with people.
Perhaps the conclusion above is correct, but two difficult relationships are probably not adequate proof. For instance, if both Fran and Leo have problems with everyone, perhaps the problem isn't Glen's. This application of the Fallacy of Composition offers a convenient alternative to justifying decisions made for other reasons.
One important distinction between a Fallacy of Composition and valid inductive reasoning is the nature of the generalization. An inductive argument contains a proof of its generalization; a fallacy of composition merely suggests its generalization. It is the subtlety of this distinction that makes the Fallacy of Composition so difficult to identify in the moment. Top Next Issue
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More articles on Effective Meetings:
- Decisions, Decisions: II
- Most of us have participated in group decision making. The process can be frustrating and painful, but
it can also be thrilling. What processes do groups use to make decisions?
- Our Last Meeting Together
- You can find lots of tips for making meetings more effective — many at my own Web site. Most are
directed toward the chair, or the facilitator if you have one. Here are some suggestions for everybody.
- Interrupting Others in Meetings Safely: II
- When we feel the need to interrupt someone who's speaking in a meeting, to offer a view or information,
we would do well to consider (and mitigate) the risk of giving offense. Here are some techniques for
interrupting the speaker in situations not addressed by the meeting's formal process.
- Interrupting Others in Meetings Safely: III
- When we need to interrupt someone who's speaking in a meeting, we risk giving offense. Still, there
are times when interrupting is in everyone's best interest. Here are some more techniques for interrupting
in situations not addressed by the meeting's formal process.
- I Could Be Wrong About That
- Before we make joint decisions at work, we usually debate the options. We come together to share views,
and then a debate ensues. Some of these debates turn out well, but too many do not. Allowing for the
fact that "I could be wrong" improves outcomes.
Forthcoming issues of Point Lookout
- Coming February 8: Kerfuffles That Seem Like Something More
- Much of what we regard as political conflict is a series of squabbles commonly called kerfuffles. They captivate us while they're underway, but after a month or two they're forgotten. Why do they happen? Why do they persist? Available here and by RSS on February 8.
- And on February 15: Four Razors for Organizational Behavior
- Deviant organizational behavior can harm the people and the organization. In choosing responses, we consider what drives the perpetrators. Considering Malice, Incompetence, Ignorance, and Greed, we can devise four guidelines for making these choices. Available here and by RSS on February 15.
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