"an expert adviser involved in making important decisions but usually lacking official status"@en-us . . . "107096211"@en-us . . "brain truster"@en-us . "0.125"^^ . . "backroom boy"^^ . . . . . . . . . "0"^^ . "backroom boy"@en-us . "109203980"@en-us . "09830759-n"^^ . "109830759"^^ .