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Single Idea 6651

[filed under theme 18. Thought / A. Modes of Thought / 5. Rationality / b. Human rationality ]

Full Idea

In the 'cab problem' (what colour was the cab in the accident?) most people estimate an 80% probability of it being a blue cab, but Bayes' Theorem calculates the probability at 41%, suggesting people put too much faith in eyewitness testimony.

Clarification

Bayes' Theorem is an equation for calculating probability, given a certain observation

Gist of Idea

People are wildly inaccurate in estimating probabilities about an observed event

Source

E.J. Lowe (Introduction to the Philosophy of Mind [2000], Ch. 8)

Book Ref

Lowe,E.J.: 'Introduction to the Philosophy of Mind' [CUP 2000], p.201


A Reaction

For details of the 'cab problem', see Lowe p.200. My suspicion is that people get into a tangle when confronted with numbers in a theoretical situation, but are much better at it when faced with a real life problem, like 'who ate my chocolate?'


The 14 ideas with the same theme [human capacity to reason]:

Socrates first proposed that we are run by mind or reason [Socrates, by Frede,M]
Aristotle makes belief a part of reason, but sees desires as separate [Aristotle, by Sorabji]
Assume our reason is in two parts, one for permanent first principles, and one for variable things [Aristotle]
Aristotle sees reason as much more specific than our more everyday concept of it [Aristotle, by Frede,M]
Descartes created the modern view of rationality, as an internal feature instead of an external vision [Descartes, by Taylor,C]
Everybody overrates their own reasoning, so it is clearly superficial [Peirce]
The fanatical rationality of Greek philosophy shows that they were in a state of emergency [Nietzsche]
It seems that we feel rational when we detect no irrationality [James]
The human intellect has not been, and cannot be, fully formalized [Nagel/Newman]
Full rationality must include morality [Foot]
Rationality is one part of our conception of human flourishing [Putnam]
People are wildly inaccurate in estimating probabilities about an observed event [Lowe]
'Base rate neglect' makes people favour the evidence over its background [Lowe]
We are also irrational, with a unique ability to believe in bizarre self-created fictions [Fogelin]