Difficulty distinguishing J from E outside Genesis.[23] Greatest weakness is the role of the redactors (editors), who seem to function as a deus ex machina to explain away difficulties.[24] Supplementary Produced by the successive addition of layers of supplementary material to a core text or group of texts. Editors are also authors, creating original narrative and interpretation. Redaction criticism Accounts for the structural consistency of the Pentateuch better than the fragmentary approach, the central core explaining its unity of theme and structure, the fragments embedded in this its diversity of language and style.[4] Fragmentary The combination of a large number of short texts.