qui va de soi

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self-evident
Obviously true, and requiring no proof, argument or explanation
evident without proof or argument; "an axiomatic truth"; "we hold these truths to be self-evident"
A fact or situation that is self-evident is so obvious that there is no need for proof or explanation. It is self-evident that we will never have enough resources to meet the demand = obvious + self-evidently self-evidently The task was self-evidently impossible. clearly true and needing no more proof = obvious
understood by itself, completely clear