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What is the Fallacy Of Composition?

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The fallacy of composition is an assumption that something has the same properties as its parts. This assumption is often wrong as can easily be illustrated in examples:
---
Airplanes are made of composite materials
Composite materials are light
Therefore, aircraft are light
---
All cells are aquatic
All organisms are composed of cells
Therefore, all organisms are aquatic
---
Silicon and metals can't do math
Microchips are made of silicon and metals
Therefore, microchips can't do math
---
A runner who runs faster can win the race
If all runners run faster they can all win the race
---
In many cases, the composition fallacy is less than obvious. For example, many people might agree with a statement such as "a company that hires smart people makes smart decisions." However, due to factors such as the Abilene Paradox, such a statement isn't generally valid.
Overview: Fallacy Of Composition
Type
Fallacy
Definition
The assumption that things have the same properties as their parts.
Related Concepts
Fallacies
Cognitive Biases
Overwhelming Exception
Next: False Analogy
More fallacies:
Abilene Paradox
Bait & Switch
Beg the Question
Catch 22
Cognitive Biases
Complexity Bias
Creeping Normality
Fallacies
False Analogy
False Balance
False Dichotomy
Gaslighting
Hindsight Bias
Nirvana Fallacy
Red Herring
Reification
Sour Grapes
Survivorship Bias
Whataboutism
More ...
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Overwhelming Exception

A common logical fallacy.

Prosecutor's Fallacy

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Whataboutism

The definition of whataboutism with examples.

Double Bind

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False Equivalence

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Law Of Excluded Middle

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Fuzzy Logic

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Magical Thinking

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Scientism

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Mutually Exclusive

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False Balance

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