Wednesday, May 2, 2012

Logical Fallacy of the Week, Week 31: Fallacy of Division

Fallacy of division – assuming that something true of a thing must also be true of all or some of its parts.

A fallacy of division occurs when one reasons logically that something true of a thing must also be true of all or some of its parts.
An example:
A Boeing 747 can fly unaided across the ocean.
A Boeing 747 has jet engines.
Therefore, one of its jet engines can fly unaided across the ocean.
The converse of this fallacy is called fallacy of composition, which arises when one fallaciously attributes a property of some part of a thing to the thing as a whole. Both fallacies were addressed by Aristotle in Sophistical Refutations.....(Follow the link for more information RK.)

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