Afterall.net

Consider all. Test All. Hold on to the good.

Illogic Primer Quotes Clippings Books and Bibliography Paper Trails Links Film

Division

Because the whole has a certain property, it is argued that the parts have that property. The whole in question may be either a whole object or a collection or set of individual members.

Examples
  1. Each brick is three inches high, thus, the brick wall is three inches high.
  2. Because the brain is capable of consciousness, each neural cell in the brain must be capable of consciousness.
Critique
Show that the properties in question are the properties of the parts, and not of the whole. If necessary, describe the parts to show that they could not have the properties of the whole.

About Stephen Downes

Many kudos are owed to Stephen Downes, the logician who originally authored this list of fallacies and made it freely available on the Web. His basic structure remains. A mirror of Downes' original site can be found here.