Claim: Soft biometrics are physical, behavioral or adhered human characteristics that can be used to identify individuals, and have been defined as  any characteristic which can be naturally described by humans.
Evidence: Soft Biometrics traits are physical, behavioural or adhered human characteristics, classifiable in pre–defined human compliant categories. Further research has shown that a larger set of soft biometric traits can be used to identify individuals. A redefinition of Soft Biometrics was proposed by Reid and Nixon as any characteristic which can be naturally described by humans.