Hypothesis
WordNet

noun


(1)   A tentative theory about the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
"A scientific hypothesis that survives experimental testing becomes a scientific theory"
"He proposed a fresh theory of alkalis that later was accepted in chemical practices"
(2)   A message expressing an opinion based on incomplete evidence
(3)   A proposal intended to explain certain facts or observations
 
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