# Conjecture vs. Guess — What's the Difference?

## Compare with Definitions

#### Conjecture

In mathematics, a conjecture is a conclusion or a proposition which is suspected to be true due to preliminary supporting evidence, but for which no proof or disproof has yet been found. Some conjectures, such as the Riemann hypothesis (still a conjecture) or Fermat's Last Theorem (a conjecture until proven in 1995 by Andrew Wiles), have shaped much of mathematical history as new areas of mathematics are developed in order to prove them.
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#### Guess

To predict (a result or an event) without sufficient information.
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#### Conjecture

An opinion or conclusion formed on the basis of incomplete information
Conjectures about the newcomer were many and varied
A matter for conjecture
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#### Guess

To assume, presume, or assert (a fact) without sufficient information.
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#### Conjecture

Form an opinion or supposition about (something) on the basis of incomplete information
Many conjectured that the jury could not agree
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#### Guess

To form a correct estimate or conjecture of
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#### Conjecture

Opinion or judgment based on inconclusive or incomplete evidence; guesswork.
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#### Guess

To suppose; think
I guess he was wrong.
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#### Conjecture

An opinion or conclusion based on guesswork
The commentators made various conjectures about the outcome of the next election.
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#### Guess

To make an estimate or conjecture
We could only guess at her motives.
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#### Conjecture

To judge or conclude by conjecture; guess
"From the comparative silence below ... I conjectured that Mr Rochester was now at liberty" (Charlotte Brontë).
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#### Guess

To estimate or conjecture correctly.
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#### Conjecture

To make a conjecture.
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#### Guess

An act or instance of guessing.
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#### Conjecture

(formal) A statement or an idea which is unproven, but is thought to be true; a guess.
I explained it, but it is pure conjecture whether he understood, or not.
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#### Guess

A conjecture arrived at by guessing.
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#### Conjecture

(formal) A supposition based upon incomplete evidence; a hypothesis.
The physicist used his conjecture about subatomic particles to design an experiment.
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#### Guess

To reach a partly (or totally) unqualified conclusion.
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#### Conjecture

A statement likely to be true based on available evidence, but which has not been formally proven.
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#### Guess

To solve by a correct conjecture; to conjecture rightly.
He who guesses the riddle shall have the ring.
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#### Conjecture

(obsolete) Interpretation of signs and omens.
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#### Guess

To suppose (introducing a proposition of uncertain plausibility).
That album is quite hard to find, but I guess you could try ordering it online.
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#### Conjecture

To guess; to venture an unproven idea.
I do not know if it is true; I am simply conjecturing here.
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#### Guess

(colloquial) To think, conclude, or decide (without a connotation of uncertainty). Usually in first person: "I guess".
"I guess you were right." "What did he say?" "He guesses you were right."
"I guess I'll go to bed."
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#### Conjecture

(transitive) To infer on slight evidence; to guess at.
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#### Guess

(obsolete) To hit upon or reproduce by memory.
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#### Conjecture

An opinion, or judgment, formed on defective or presumptive evidence; probable inference; surmise; guess; suspicion.
He [Herodotus] would thus have corrected his first loose conjecture by a real study of nature.
Conjectures, fancies, built on nothing firm.
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#### Guess

A prediction about the outcome of something, typically made without factual evidence or support.
If you don't know the answer, take a guess.
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#### Conjecture

To arrive at by conjecture; to infer on slight evidence; to surmise; to guess; to form, at random, opinions concerning.
Human reason can then, at the best, but conjecture what will be.
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#### Guess

To form an opinion concerning, without knowledge or means of knowledge; to judge of at random; to conjecture.
First, if thou canst, the harder reason guess.
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#### Conjecture

To make conjectures; to surmise; to guess; to infer; to form an opinion; to imagine.
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#### Guess

To judge or form an opinion of, from reasons that seem preponderating, but are not decisive.
We may then guess how far it was from his design.
Of ambushed men, whom, by their arms and dress,To be Taxallan enemies I guess.
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#### Conjecture

A hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence);
Speculations about the outcome of the election
He dismissed it as mere conjecture
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#### Guess

To solve by a correct conjecture; to conjecture rightly; as, he who guesses the riddle shall have the ring; he has guessed my designs.
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#### Conjecture

A message expressing an opinion based on incomplete evidence
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#### Guess

To hit upon or reproduce by memory.
Tell me their words, as near as thou canst guess them.
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#### Conjecture

Reasoning that involves the formation of conclusions from incomplete evidence
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#### Guess

To think; to suppose; to believe; to imagine; - followed by an objective clause.
Not all together; better far, I guess,That we do make our entrance several ways.
But in known images of life I guessThe labor greater.
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#### Conjecture

To believe especially on uncertain or tentative grounds;
Scientists supposed that large dinosaurs lived in swamps
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#### Guess

To make a guess or random judgment; to conjecture; - with at, about, etc.
This is the place, as well as I may guess.
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#### Guess

An opinion as to anything, formed without sufficient or decisive evidence or grounds; an attempt to hit upon the truth by a random judgment; a conjecture; a surmise.
A poet must confessHis art 's like physic - but a happy guess.
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#### Guess

A message expressing an opinion based on incomplete evidence
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#### Guess

An estimate based on little or no information
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#### Guess

Expect, believe, or suppose;
I imagine she earned a lot of money with her new novel
I thought to find her in a bad state
He didn't think to find her in the kitchen
I guess she is angry at me for standing her up
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#### Guess

Put forward, of a guess, in spite of possible refutation;
I am guessing that the price of real estate will rise again
I cannot pretend to say that you are wrong
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#### Guess

Judge tentatively or form an estimate of (quantities or time);
I estimate this chicken to weigh three pounds
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#### Guess

Guess correctly; solve by guessing;
He guessed the right number of beans in the jar and won the prize
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