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How We Reason$
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Philip Johnson-Laird

Print publication date: 2008

Print ISBN-13: 9780199551330

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780199551330.001.0001

ContentsFRONT MATTER

How we Reason

Chapter:
(p. 414 ) Chapter 28 How we Reason
Source:
How We Reason
Author(s):

Philip N. Johnson-Laird

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199551330.003.0028

This chapter explains the heart of a human's reasoning. Mental models of possibilities are at the heart of this reasoning. The theory confronts two challenges that pull in opposite directions. It must account for the nature of the errors that are made in reasoning; and it must explain the potential for rationality. At the heart of human rationality are some simple principles that are recognized: a conclusion must be the case if it holds in all the possibilities compatible with the premises. The models that have been argued for here underlie deduction, induction, and abduction. The argument of this book is that reasoning depends on mental models, and that a conclusion can be comprehended which follows from premises if it holds for every model of the premises.

Keywords:   reasoning, human rationality, mental models of possibilities, deduction, induction, abduction

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