A **conjecture** is a proposition that is unproven. Karl Popper pioneered the use of the term "conjecture" in scientific philosophy. Conjecture is contrasted by hypothesis (hence *theory, axiom, principle*), which is a testable statement based on accepted grounds. In mathematics, a conjecture is an unproven proposition that appears correct.

Read more about Conjecture: Famous Conjectures, Counterexamples, Use of Conjectures in Conditional Proofs, Undecidable Conjectures

### Famous quotes containing the word conjecture:

“There is something fascinating about science. One gets such wholesale returns of *conjecture* out of such a trifling investment of fact.”

—Mark Twain [Samuel Langhorne Clemens] (1835–1910)

“What these perplexities of my uncle Toby were,—’tis impossible for you to guess;Mif you could,—I should blush ... as an author; inasmuch as I set no small store by myself upon this very account, that my reader has never yet been able to guess at any thing. And ... if I thought you was able to form the least ... *conjecture* to yourself, of what was to come in the next page,—I would tear it out of my book.”

—Laurence Sterne (1713–1768)