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hypothesis

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A hypothesis is an unproven theory or statement. (noun)

An example of hypothesis is the theory of evolution.

See hypothesis in Webster's New World College Dictionary

an unproved theory, proposition, supposition, etc. tentatively accepted to explain certain facts or () to provide a basis for further investigation, argument, etc.

See hypothesis in American Heritage Dictionary 4

(hī-pŏthˈĭ-sĭs)

noun pl. hy·poth·e·ses (-sēzˌ)

A tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation.
Something taken to be true for the purpose of argument or investigation; an assumption.
The antecedent of a conditional statement.

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