• WordNet 3.6
    • n certainty something that is certain "his victory is a certainty"
    • n certainty the state of being certain "his certainty reassured the others"
    • ***
Webster's Revised Unabridged Dictionary
    • Certainty A fact or truth unquestionable established. "Certainties are uninteresting and sating."
    • Certainty (Law) Clearness; freedom from ambiguity; lucidity.
    • Certainty The quality, state, or condition, of being certain. "The certainty of punishment is the truest security against crimes."
    • ***
Century Dictionary and Cyclopedia
    • n certainty The quality or fact of being certain, fixed, determinate, or sure; the possession, as by a judgment or proposition, of certain marks which place it in the class of true propositions; exemption from failure or liability to fail; infallibility; inevitability: as, the certainty of an event, or of the success of a remedy.
    • n certainty A clearly established fact, truth, or state; that which is positively ascertained, demonstrated, or intuitively known, or which cannot be questioned.
    • n certainty That which is sure to be or occur; an assured event or result; an unerring forecast.
    • n certainty Full assurance of mind; exemption from doubt; certitude.
    • n certainty Same as certain, 3.
    • ***
Chambers's Twentieth Century Dictionary
    • ns Certainty .—'A certain person,' implying some degree of contempt
    • ***


  • Thomas Carlyle
    “One must verify or expel his doubts, and convert them into the certainty of Yes or NO.”
  • William J. Durant
    “Inquiry is fatal to certainty.”
  • Bertrand Russell
    “What men want is not knowledge, but certainty.”
  • Arthur Schopenhauer
    “The present is the only reality and the only certainty.”
  • Voltaire
    “Doubt is not a pleasant mental state, but certainty is a ridiculous one.”
  • Sylvia Ashton Warner
    Sylvia Ashton Warner
    “I tore myself away from the safe comfort of certainties through my love for truth; and truth rewarded me.”


Webster's Revised Unabridged Dictionary
OF. certaineté,
Chambers's Twentieth Century Dictionary
O. Fr.,—L. certuscern-ĕre, to decide.


In literature:

It was her certainty of Nicky's vision that drove her to the supreme act of courage.
"The Creators" by May Sinclair
What he had dreaded he now knew for certainty.
"A Son of Hagar" by Sir Hall Caine
You gained me the certainty of forgiveness, without which I should have felt a curse on my work.
"Hopes and Fears scenes from the life of a spinster" by Charlotte M. Yonge
It was not risk; it was certainty.
"Casa Braccio, Volumes 1 and 2 (of 2)" by F. Marion Crawford
A man wants pretty near a certainty before he puts up the stuff.
"A Black Adonis" by Linn Boyd Porter
Two years and the certainty of graduation would have suited her better, but two years was a long time.
"The Wind Before the Dawn" by Dell H. Munger
All through the play there are warnings against human certainty.
"William Shakespeare" by John Masefield
On this point it is not possible to speak with any certainty.
"The Story of the Heavens" by Robert Stawell Ball
The certainty of this would ever intrude and quench his exultation.
"The Sign of the Spider" by Bertram Mitford
We were sustained by the certainty of the love of God.
"A Handful of Stars" by Frank W. Boreham
It is not a matter that can be argued with certainty.
"The Settlement of Wage Disputes" by Herbert Feis
The only number composed only of ones that we know with certainty to have no divisor is 11.
"The Canterbury Puzzles" by Henry Ernest Dudeney
What had been at first only a conjecture, soon became a certainty.
"The Giraffe Hunters" by Mayne Reid
Rather was it a certainty.
"The Ocean Waifs" by Mayne Reid
When this certainty is assured to him he quickly pardons and forgets the injuries he has suffered.
"A History of Art in Chaldæa & Assyria, v. 1" by Georges Perrot
And did so, with no result; merely expression of abstract certainty that it was sure to come.
"Somehow Good" by William de Morgan
Gone was the swift certainty of control.
"Astounding Stories of Super-Science February 1930" by Various
Certainty was in his face, and doubt in theirs.
"Red Men and White" by Owen Wister
He saw dimly that the mistake he had made was in hoping for anything of the nature of certainty.
"Beside Still Waters" by Arthur Christopher Benson
No answer came to the question, yet of a certainty she was happier under some conditions than others.
"Lady Cassandra" by Mrs George de Horne Vaizey

In poetry:

Will they inherit me
one day? What certainties
have I to hand on
like the punctuality
"Sarn Rhiw" by R S Thomas
Cruel? I think there never was a cheating
More cruel, thro' all the weary days than this!
This is no dream, my heart kept on repeating,
But sober certainty of waking bliss.
"In the Night" by Amy Levy
The cross thou for a certainty must bear,
Ere thou the crown triumphal canst obtain:
In all my days, I never yet did hear
That one the crown, without the cross, cou'd gain.
"A Letter From Sir Lewis Mansel Of Margam, In Glamorganshire, As 'Tis Suppos'd, To The Vicar Prichard" by Rees Prichard
If for thy guardian thou dost Christ refuse,
And dost not Christ for thy director chuse,
No one, with any certainty, can tell
How thou may'st save thy precious soul from hell.
"Advice, To Search For The Lord Jesus Christ" by Rees Prichard
XV. But oh! when cherish'd Hope reposed its soul
Upon a new-born certainty of joy,
Death from the arms of pending pleasures stole,
And years of promis'd bliss, the Minstrel Boy.
"The Minstrel Boy" by Sydney Owenson
"Cheered onward by this promise sure,
Strong in the faith entire and pure
Thou dost profess,
Depart, thy hope is certainty,
The third, the better life on high
Shalt thou possess."
"Coplas De Manrique (From The Spanish)" by Henry Wadsworth Longfellow

In news:

"Death and taxes" — the cynic's answer to the question of worldly certainty.
" And one component of that test is often convincing a federal judge that there is a "certainty of hopelessness " to their financial lives for much of the repayment period.
It seems the potential FCS playoff field has more certainty than a Florida presidential election.
The eventuality was always a near certainty.
So much for Washington certainties.
Victorian jockey Glen Boss is no certainty to retain the ride on Ocean Park when the Matamata galloper embarks on an international campaign next year, with trainer Gary Hennessy considering Kiwi jockeys .
NHL lockout gives best talent to Canada's junior team, but takes away certainty.
While leaders warned that austerity measures might worsen the European recession, Spain's prime minister urged for more legal certainty in Latin America .
It's almost a certainty that the Democrats will lose a lot of ground.
The Pointless Pursuit of "Tax Certainty".
Death and taxes have long been the only two certainties of life.
Oscar certainties and some surprises.
He'll want you to play football and if he winds up coaching your team (almost a certainty), he'll go the pretty-much-obsessed route.
Like most of his fellow bowl executive, Steve Beck sees plenty of scenarios but not a lot of certainty.
CEOs Tell Politico They Need "Tax Certainty," But They Really Mean Tax Cuts The New Republic.

In science:

Unless K is known, any classical algorithm for this problem would require N 2 + 1 evaluations of f in worst case before determining the answer with certainty.
Quantum Algorithm for Generalized Deutsch-Jozsa Problem
In = −20), then with absolute certainty we can predict that the next values will be negative and |In | → 0.
Exact solutions to chaotic and stochastic systems
There is no way to predict with certainty the value of X(t) during a given symbol duration, based on the values of X(t) during the past symbols.
On Superluminal Propagation and Information Velocity
Conclusive discrimination means that our measurement on the copy gives three outcomes which allow us to determine the prior state is |φi or |ψi with certainty or ”don’t know”.
Optimally Conclusive Discrimination of Non-orthogonal Entangled States Locally
Occurrence of |si i, i ≤ m pro jects system AB onto |φi i or |ψi i which is orthogonal to each other and can be distinguished with certainty by the protocol in .
Optimally Conclusive Discrimination of Non-orthogonal Entangled States Locally
Individuals die with certainty if their age reaches ad , and they die earlier with probability N (t)/Nmax at every iteration, where N (t) is the actual population and Nmax a so-called carrying capacity taking into account the limitations of food and space (Verhulst factor).
Applications and Sexual Version of a Simple Model for Biological Ageing
The certainty that RT does not arise comes from the fact that the velocity field converges onto the fragments rather than shear between them, as would be expected for RT.
The nonlinear development of the thermal instability in the atomic ISM and its interaction with random fluctuations
Mining structure typically entails identifying characteristics, such as the degree of connectivity or clustering to make statements with certainty about the underlying domain and social process.
A Connection-Centric Survey of Recommender Systems Research
Each |iihi| is an individual state because, considered as a matrix, it has probability 1 (certainty); in other words, it contains maximum information since T r(|iihi|2 ) = 1; therefore, if conceived as an ensemble, it would represent a set of copies of the same state |iihi|, thus, one |iihi| is sufficient.
The cosmological origin of time-asymmetry
We suspect that this is an artifact of the small sample size, but we cannot rule out with certainty that is a real, physical effect.
Dynamics of the Globular Cluster System Associated with M49 (NGC4472): Cluster Orbital Properties and the Distribution of Dark Matter
What constitutes a “sufficient” number of points is in general difficult to determine (and impossible to determine with absolute certainty) - though there are tests which are good indicators.
Precision Primordial $^4$He Measurement with CMB Experiments
In part because it implies that there is a fundamental limitation to what we can know with absolute certainty about the nature of reality.
From Knowledge, Knowability and the Search for Objective Randomness to a New Vision of Complexity
In the error-minimizing measurement scheme the measurement is required to be exhaustive and conclusive in the sense that in each single case with certainty one of the two possible states is identified, although perhaps incorrectly, while inconclusive results allowing no identification do not occur.
Distinguishing mixed quantum states: Minimum-error discrimination versus optimum unambiguous discrimination
For the more chaotic slow solar wind, the relative roles of steady streamer-edge flows (as emphasized by UVCS abundance analysis) versus bright blob structures (seen by LASCO) need to be understood before the relation between streamer heating and and slow-wind acceleration can be known with certainty.
Coronal Heating versus Solar Wind Acceleration
To mask known stars for the SNfactory search subtractions, a list was constructed of objects that were classi fied as being stars with at least 80% certainty in both filters.
Rates and Progenitors of Type Ia Supernovae