Conjunction fallacy

What it is

Judges a combination of events as more probable than one of them alone, though a conjunction can never be more likely than either part.

Related

• Narrative fallacy bias
  A richer, more coherent story feels likelier although each added detail makes it less probable.
• Representativeness heuristic bias
  The conjunction fallacy arises because a detailed description is more representative, so it feels more probable.

Appears in

• The 99 thinking errors in Rolf Dobelli's The Art of Thinking Clearly#41: Conjunction fallacy
• Kahneman and Tversky's heuristics and biases#7: Conjunction fallacy (the Linda problem)

References

• Wikipedia: Conjunction fallacy en.wikipedia.org
• The 99 thinking errors in Rolf Dobelli's The Art of Thinking Clearly en.wikipedia.org
• Kahneman and Tversky's heuristics and biases en.wikipedia.org
• Internet Encyclopedia of Philosophy: Fallacies iep.utm.edu
• Stanford Encyclopedia of Philosophy: Fallacies plato.stanford.edu
• Wikipedia: List of fallacies en.wikipedia.org
• Purdue OWL: Logical fallacies owl.purdue.edu

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