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rational fear

1. Something big, hairy, and scary. (No, dude, not your penis...I said big :-) ) that can ACTUALLY happen to you, as opposed to an irrational fear.
2. Something not physically scary, but mentally terrifying yet very real...like an "aw, shit" moment.
Examples of rational fears:
That 90 pound Rottweiler that's about to latch onto your ass like it was a big, meaty, steak.

That 15-year old girl's father after he found out you were studying anatomy instead of geometry.

Worrying that you're gonna flunk geometry because you were studying anatomy instead of geometry.
by StevieTheOldFrigginFart August 12, 2016
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Rational Wiki

A wiki mostly dedicated to debunking antiscience movements and other quackery aswell as countless other articles dealing with logic and current events. Often touted as being biased towards the left a more accurate definition might be biased towards facts.
Hillaryforprison88: The stupid leftys at the rational wiki think being egalitarian means your a chauvinist
Normaldude14: Actually if you read the article it explains how egalitarianism and feminism are not mutually exclusive and that egalitarianism in almost certainly a good thing, and that people who claim to be egalitarians instead of feminist have fundamental misunderstandings of what feminism is and instead choose to lump all feminism into one monolithic ideological project.
Hillaryforprison88: Wait that is reasonably abstract and complex and doesn't instantly fit into my world view, therefor it must be irrational
by Ilovemmikehawk0000 July 8, 2017
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post-rational

Clinging to a belief that was once rational but current circumstances have rendered irrational.
At the Democratic National Convention, some Hillary supporters clung to the post-rational belief that Hillary could be the Democratic nominee.
by Jayrosh October 16, 2008
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My Rationality

The rationality that is only understood by you. Usually used when you say or do something that makes no sense.
Person 1: Why did the banana turn into a coconut?
Person 2: Why?
Person 1: BECAUSE IT WAS A COOKIE!!!!
Person 2: That makes no sense
Person 1: Understand my rationality
Person 2: Which is?
Person 1: I'm an asshole.
by Harry Scrotes July 1, 2008
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rational assumption

The word utilized by caucasians in the scientific community when they realize that their 10 years in graduate school went down the shitter and they have no fucking clue what they're talking about but they still want to sound smart. Comparitive to conjecture, speculate, or hypothesize. This term is basically the honkey's way of saying "guess" while still maintaining a know-it-all air about themselves.
"I may be going out on a limb, but I will make a rational assumption and say that in 20 years there will not be a single white NBA player left because they are all afraid of Lebron James's big black cobra."
by zac sutherland June 17, 2008
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Rationalization Hamster - It is a creature that inhabits the female brain and helps them spin out rationalizations when they get into a predicament. When faced with a a dilemma, the female brain that houses the rationalization hamster, causes the hamster to start working by jumping on its wheel and running really hard. In the process it spins out a rationalization – an excuse, that absolves the woman of the blame and predicates it upon farcical self- justification.
Female - I know it is not his baby, but if I don't tell him that, it's not actually a lie. After all, I won't be hurting his feelings.

Guy - Wow! So you believe it's not a lie when you make him falsely believe that the child is his, and hide the fact that you lied to and cheated on him?

Female - It just happened like that. I was heavily drunk and was not thinking clearly. So it's not my fault, you see.

Guy - Damn, that female rationalization hamster must be working overtime!
by DDwd5 February 23, 2014
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*noun*; a method of representing the economy as the sum of many identical individuals and firms, each represented by a system of mathematical equations. The Rational Expectations Hypothesis (REH) takes its name from the premise that economic actors, i.e., everyone, do not make consistent errors about the present or future behavior of markets.

REH was devised mainly as a rebuke to Keynesian economics, and in particular, the strategy of fiscal policy or monetary policy.

According to the REH, fiscal policy does not alter aggregate demand because the "average" person recognizes that her lifetime income is not increasing--so she needs to save rather than spend the stimulus money, in anticipation of higher taxes in the future.

At the same time, monetary policy does not work because it relies on lowering interest rates to make more money available; more money means inflation, but people have to be deceived into thinking prices for their product are going up, so they will expand production. According to REH, people or firms will figure this out, and see increased demand as mere inflation. Instead of increasing output and employment, they'll want to raise prices so they can meet their future bills.

According to REH, both monetary and fiscal policy rely on illusions to work; and since people (on average) will make rational estimates o the future, they will defeat these illusions.
The rational expectations hypothesis states that we can break the realization of a return into an expected return that depends on the current information set and an unexpected component that depends only on new information.
by Abu Yahya March 3, 2009
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