noun: One who acts as if they know everything, dismissing others’ ideas or advice.
go-between Definition: (noun) A negotiator who acts as a link between parties. Synonyms: intercessor, intermediary, mediator. Usage: A skilled go-between can prove invaluable to businesses when negotiations become hostile or contentious. Discuss
Pierre Charron "The advice of friends must be received with a judicious reserve; we must not give ourselves up to it and follow it blindly, whether right or wrong."