Conjecture vs. Guess — What's the Difference?

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.

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

An opinion or conclusion formed on the basis of incomplete information

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

Form an opinion or supposition about (something) on the basis of incomplete information

To form a correct estimate or conjecture of

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

To suppose; think

An opinion or conclusion based on guesswork

To make an estimate or conjecture

To judge or conclude by conjecture; guess

To estimate or conjecture correctly.

To make a conjecture.

An act or instance of guessing.

(formal) A statement or an idea which is unproven, but is thought to be true; a guess.

A conjecture arrived at by guessing.

(formal) A supposition based upon incomplete evidence; a hypothesis.

To reach a partly (or totally) unqualified conclusion.

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

To solve by a correct conjecture; to conjecture rightly.

(obsolete) Interpretation of signs and omens.

To suppose (introducing a proposition of uncertain plausibility).

To guess; to venture an unproven idea.

(colloquial) To think, conclude, or decide (without a connotation of uncertainty). Usually in first person: "I guess".

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

(obsolete) To hit upon or reproduce by memory.

An opinion, or judgment, formed on defective or presumptive evidence; probable inference; surmise; guess; suspicion.

A prediction about the outcome of something, typically made without factual evidence or support.

To arrive at by conjecture; to infer on slight evidence; to surmise; to guess; to form, at random, opinions concerning.

To form an opinion concerning, without knowledge or means of knowledge; to judge of at random; to conjecture.

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

To judge or form an opinion of, from reasons that seem preponderating, but are not decisive.

A hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence);

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

A message expressing an opinion based on incomplete evidence

To hit upon or reproduce by memory.

Reasoning that involves the formation of conclusions from incomplete evidence

To think; to suppose; to believe; to imagine; - followed by an objective clause.

To believe especially on uncertain or tentative grounds;

To make a guess or random judgment; to conjecture; - with at, about, etc.

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 message expressing an opinion based on incomplete evidence

An estimate based on little or no information

Expect, believe, or suppose;

Put forward, of a guess, in spite of possible refutation;

Judge tentatively or form an estimate of (quantities or time);

Guess correctly; solve by guessing;