The inquisitorial system applies to questions of criminal procedure at trial, not substantive law; that is, it determines how criminal inquiries and trials are conducted, not the kind of crimes for which one can be prosecuted or the sentences that they carry. It is most readily used in some civil legal systems. However, some jurists do not recognize this dichotomy, and see procedure and substantive legal relationships as being interconnected and part of a theory of justice as applied differently in various legal cultures.