Changes

[[File:Cerebellum.jpg|right|thumb|200px|The human [[brain]] is the most complex physical entity in the universe.<ref>[http://creation.com/the-human-body-gods-masterpiece The Human Body: God's Masterpiece]</ref><ref>[http://creation.com/the-human-body-gods-masterpiece The Enigmatic Human Brain] by Wallace G. Smith</ref><ref>[http://www.creationmoments.com/radio/transcripts/most-complex-structure The Most Complex Structure], Creation Moments</ref>]]

[[File:Cerebellum.jpg|right|thumb|200px|The human [[brain]] is the most complex physical entity in the universe.<ref>[http://creation.com/the-human-body-gods-masterpiece The Human Body: God's Masterpiece]</ref><ref>[http://creation.com/the-human-body-gods-masterpiece The Enigmatic Human Brain] by Wallace G. Smith</ref><ref>[http://www.creationmoments.com/radio/transcripts/most-complex-structure The Most Complex Structure], Creation Moments</ref>]]

'''Rationality''' is the property of doing or believing what reason requires. There are two types of rationality:

'''Rationality''' is the property of doing or believing what reason requires. There are two types of rationality:

*''epistemic rationality'' is about what we believe, whether our beliefs are rational given the evidence we have available to us. For example, Tom believes his teacher is an adulterer because he read it written on the walls of the school bathroom, and because he doesn't like his teacher. Tom's belief is irrational, because it is based on an unreliable source of knowledge (the bathroom wall) and his own personal dislike

*'[[Epistemology|Epistemic]] rationality'' is about what we believe, whether our beliefs are rational given the evidence we have available to us. For example, Tom believes his teacher is an adulterer because he read it written on the walls of the school bathroom, and because he doesn't like his teacher. Tom's belief is irrational, because it is based on an unreliable source of knowledge (the bathroom wall) and his own personal dislike

*''instrumental rationality'' is about doing what is sensible given our goals. Tom wants to go to law school one day; but instead of studying he plays computer games. Tom's behavior is not rational, because it undermines the goal he has set for himself. On the other hand, if Tom wants to have a career as a janitor instead of going to law school, then playing computer games is not irrational for him.

*''Instrumental rationality'' is about doing what is sensible given our goals. Tom wants to go to law school one day; but instead of studying he plays computer games. Tom's behavior is not rational, because it undermines the goal he has set for himself. On the other hand, if Tom wants to have a career as a janitor instead of going to law school, then playing computer games is not irrational for him.

== Epistemic rationality ==

== Epistemic rationality ==