"based on custom rather than documentation; \"an unwritten law\"; \"rites...so ancient that they well might have had their unwritten origins in Aurignacian times\"- J.L.T.C.Spence"@en-us . . "unwritten"^^ . "0.216661"^^ . . "0.0609994"^^ . . "0.127441"^^ . "302286927"@en-us . "302286927"^^ . . "0.205156"^^ . "0.22871"^^ . "0.0614374"^^ . "0.0"^^ . . "unwritten"@en-us . "02286927-a"^^ . "0.0995945"^^ . "0.25"^^ . "302204942"@en-us . "0.375"^^ .