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hypothesis

/haɪˈpɒθɪsɪs/ noun C2
  1. A tentative conjecture explaining an observation, phenomenon or scientific problem and that can be tested by further observation, investigation, or experimentation.
  2. An assumption taken to be true for the purpose of argument or investigation.
  3. The antecedent of a conditional statement.

Plural hypotheses

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From the library

We may take it as a working hypothesis that 534 is the particular page to which the cipher refers.
The Valley of Fear, p. 6 · C1
“If so, it would, of course, be against the first hypothesis and in favour of the second.
The Valley of Fear, p. 18 · C1
“Well, we can adopt it as a working hypothesis and then see how far our difficulties disappear.
The Valley of Fear, p. 45 · C1
That all fits into your hypothesis, Watson.
The Valley of Fear, p. 70 · C1

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.