presumption
definition
an idea that you think is true as it seems logical
example
There is a general presumption that carbohydrates are unhealthy, but actually they are an essential source of energy when consumed in moderation.
synonyms
assumptionbeliefthought
word origin — Middle English: from Old French presumpcion, from Latin praesumptio(n-) ‘anticipation’, from the verb praesumere (see presume)