• "Fool." Neapolitan
    "Fool." Neapolitan
  • WordNet 3.6
    • adj fooling characterized by a feeling of irresponsibility; it is no fooling matter" "a broken back is nothing to be casual about"
    • ***

Additional illustrations & photos:

"Be a fool if you want to." "Be a fool if you want to."

Century Dictionary and Cyclopedia
  • Interesting fact: The iron disulfide (Pyrite) is considered "fool's gold" because it looks very similar to gold.
    • n fooling The speech or actions of one who fools or banters another; jesting; banter; levity; frivolity; nonsense.
    • n fooling Ridiculous or absurd behavior; foolery; idle, aimless, or meddlesome action.
    • n fooling Playful actions; play; sport.
    • ***
Chambers's Twentieth Century Dictionary
    • ns Fooling foolery
    • ***


  • Samuel Butler
    “There are more fools than knaves in the world, else the knaves would not have enough to live upon.”
  • Sebastien-Roch Nicolas De Chamfort
    “How many fools does it take to make up a public?”
  • Isaac Disraeli
    Isaac Disraeli
    “The wise make proverbs, and fools repeat them.”
  • Desiderius Erasmus
    “Fools are without number.”
  • Benjamin Franklin
    “Most fools think they are only ignorant.”
  • Robert Frost
    “A mother takes twenty years to make a man of her boy, and another woman makes a fool of him in twenty minutes.”


A fool and his money are soon parted - This idiom means that people who aren't careful with their money spend it quickly. 'A fool and his money are easily parted' is an alternative form of the idiom.
A fool at 40 is a fool forever - If someone hasn't matured by the time they reach forty, they never will.
Fool me once, shame on you; fool me twice, shame on me - This means that you should learn from your mistakes and not allow people to take advantage of you repeatedly.
Fool's paradise - A fool's paradise is a false sense of happiness or success.
Fools rush in where angels fear to tread - This idiom is used where people who are inexperienced or lack knowledge do something that more informed people would avoid.
Play the fool - If someone plays the fool, they behave in a silly way to make people laugh. ('Act the fool' is and alternative form.)


Chambers's Twentieth Century Dictionary
O. Fr. fol (Fr. fou), It. folle—L. follis, a wind-bag.


In literature:

You are the fool; would you broach us to, and end it now?
"The Best Short Stories of 1921 and the Yearbook of the American Short Story" by Various
Don't let fools use it for their own ends.
"The Victim" by Thomas Dixon
I remember Ferguson said once: 'All men are fools and half of them are bloody fools.
"The Loom of Youth" by Alec Waugh
Ranch Number Ten ought to belong to the fool boy now, oughtn't it?
"Man to Man" by Jackson Gregory
Was it but to be proof to the men who called him fool that fool he was?
"The Short Cut" by Jackson Gregory
Bell River Indian all damn fool.
"The Triumph of John Kars" by Ridgwell Cullum
I'm no fool, nor you, so you must know it as well as I do.
"Brigands of the Moon" by Ray Cummings
I wouldn't fool with no sech scholar ef I wuz you.
"The Southerner" by Thomas Dixon
If I were not a fool, I should make it up with him before he went; but I am a fool, and shall remain so to the last.
"Can You Forgive Her?" by Anthony Trollope
Huh, they said he was a fool and didn't know how to figure.
"Dixie Hart" by Will N. Harben
Men may live fools but fools they cannot die.
"Watch Yourself Go By" by Al. G. Field
We didn't fool with raw beans, in bulk.
"Pluck on the Long Trail" by Edwin L. Sabin
If he had the fool's shape, he would play the fool's part to save Perpetua.
"The Proud Prince" by Justin Huntly McCarthy
Yes, I did make a fool of myself!
"In Connection with the De Willoughby Claim" by Frances Hodgson Burnett
Why should he sit like a fool before her merely because he had told her that on which he had long decided?
"The Bertrams" by Anthony Trollope
He's no the fool that the fool is, but he that wi' the fool deals.
"The Proverbs of Scotland" by Alexander Hislop
Dat de way you fool my ole gran'daddy; but you can't fool we-all.
"Nights With Uncle Remus" by Joel Chandler Harris
Fools must expect fools' reward.
"Ireland as It Is" by Robert John Buckley (AKA R.J.B.)
But if he carries it into wedlock he's a damned fool, in my opinion.
"Love and Lucy" by Maurice Henry Hewlett
An' they just fool it away!
"Changing Winds" by St. John G. Ervine

In poetry:

Oh curse me for a fool
To be so proud;
To stand so still and cool
Amid the crowd.
For President or Peer
God, let me cheer!
"At The Parade" by Robert W Service
All the gang of those who rule us
Hope our quarrels never stop
Helping them to split and fool us
So they can remain on top.
"Solidarity Song" by Bertolt Brecht
How can I tell, who am a fool,
If this be Christ or no?
Those bleeding hands outstretched to me!
Those eyes that love me so!
"The Robe Of Christ" by Alfred Joyce Kilmer
That fools have prestige, place and power and fame;
Can it be true
That wisdom is a scorn, a hissing shame,
And wise are few?
"A Christmas Chant" by Abram Joseph Ryan
"Don't wait, go there," says it to me,
As often as I think of him;
My heart, don't act so stupidly,
Why do you play the fool?
"My Heart Flutters Hastily" by Anonymous Africas
Ah fool! why dost thou reason thus?
Ambition's very fool!
Through high and low, each glorious,
Shines God's all-perfect rule.
"The Disciple" by George MacDonald

In news:

"It is not so easy to fool little girls nowadays as it used to be".
This being Science Friday, I'm not ready to let go of the possibility that scientists really did find that neutrinos travel faster than the speed of light, even though I'm probably among the fools (click image for readable laugh).
Canadian Airline Pulls April Fool's Prank.
Canadian airline WestJet proposed a humorous alternative in this April Fool's commercial.
Recipes for Rabbit Fricasse and Raspberry Fool.
Can you believe good ol' Bernie would go and do a fool thing like that.
Don't let a tag fool you into buying a fruit tree that'll grow too tall.
Plan now for April Fool's gadgetry .
Giordano Bruno , martyr or fool.
Readers sound off about lunch programs, water issues, hateful rhetoric and Nobody's Fool.
Well, they tried but I thought it was a fools errand.
That may sound like a nutrition columnist's idea of an April Fools' Day joke.
Let's hope it isn't too serious or long term (or this is the greatest April Fool's joke ever.).
Tommaso De Benedetti nearly fooled me.
Don't let the low horsepower fool you.

In science:

Now X fools both of these functions to within 2Oc (d)ǫ.
A Small PRG for Polynomial Threshold Functions of Gaussians
The random variable X described in the previous sections, although it does fool PTFs, has infinite entropy and hence cannot be used directly to make a PRG.
A Small PRG for Polynomial Threshold Functions of Gaussians
Hence for such δ , we can apply Lemma 21 and find that Z fools degree d polynomial threshold functions to within ǫ + O(nN δ + d√nN log(δ−1 )δ1/d ).
A Small PRG for Polynomial Threshold Functions of Gaussians
Viola, Bounded independence fools halfspaces, Proceedings of the 50th Annual IEEE Symposium on Foundations of Computer Science (FOCS), 2009.
A Small PRG for Polynomial Threshold Functions of Gaussians
Viola, Bounded independence fools halfspaces, SIAM J.
Concentration and Moment Inequalities for Polynomials of Independent Random Variables
We would like to point out that for the bound on P [G ] to hold, it is crucial that ρAB is independent of (X , Y ) (and the (Xi , Yi )’s are iid): clearly, the device can fool you if it knows the inputs it will get in advance.
Security and Composability of Randomness Expansion from Bell Inequalities
The more influence she has, the less “free will” can be attributed to Alice and Bob, and if they wrongly assume that they have complete free will, they can be fooled into thinking that their observed outputs are not predetermined.
The effects of reduced "free will" on Bell-based randomness expansion
Conclusions.—We have shown that by influencing the apparently free choice of measurement settings in a Bell test, the adversary can fool the participants into thinking they share quantum correlations when, in fact, they do not and are being manipulated.
The effects of reduced "free will" on Bell-based randomness expansion
The second class of tests we will need to fool is the class of read-once DNF formulae over {0, 1}m.
Streaming algorithms for recognizing nearly well-parenthesized expressions
It is clear that some “taste” tests are harder to fool than others, so clearly, we will seek and prefer the tough ones as discriminators.
A Guide to Comparisons of Star Formation Simulations with Observations
People are easily fooled, and are especially easily fooled into reading structure into chaos, reading meaning into nonsense.
Lessons from a Restricted Turing Test
People are even more easily fooled when their ability to detect fooling is explicitly vitiated, for instance, by a prohibition against using “trickery or guile”.5 When I asked Mr.
Lessons from a Restricted Turing Test
Also, the use of errorbars and quantitative error analyses were in their infancy. These aspects of the state of scientific knowledge combined to permit him to be fooled into thinking his interferometer measurements did indeed determine the “absolute motion of the earth”.
An Explanation of Dayton Miller's Anomalous "Ether Drift" Result
This paper has not only explained how Miller was fooled, it has also presented a re-analysis of his data.
An Explanation of Dayton Miller's Anomalous "Ether Drift" Result
NLP) using quantitative (say statistical, corpus-based or machine learning) tools are not fully fool proof.
An OLAC Extension for Dravidian Languages