Definition:Hypothesis

Definition
A hypothesis is a statement that is made whose truth value has not been established, but which is believed to be true.

The underlying idea is that its truth or falsehood is about to be investigated.

A hypothesis is considered by some branches of philosophy as being synonymous with the words wild guess.

Possibly the most famous still-unproved hypothesis is the Riemann Hypothesis.

Linguistic Note
The word hypothesis comes from the Greek for supposition, literally to put under, i.e. sub-position. The idea is that one puts an idea under scrutiny.

Its plural is hypotheses where the last syllable is pronounced sees.

The verb hypothesize (British English: hypothesise) means to make a hypothesis, that is, to suppose.

The adjective hypothetical means having the nature of a hypothesis. A hypothetical question is a question which relates to a situation that is supposed (or pretended) to be imaginary. One would, for example, announce that a question about to be posed is hypothetical if the questioner wishes to be believed to be at some distance from the possibility of actually being the subject of the question.


 * "As a purely hypothetical question, what would the fate be of a student who had been found to have cheated in his examinations?"

Alternative meanings
Some sources use the word hypothesis for a premise.

Some use hypothesis to mean antecedent in the context of a conditional statement.