If Crossan is correct, then Jesus Research cannot make genuine and meaningful progress apart from careful study of the agrapha and apocryphal gospels. If Meier is correct, then the potential contribution of the agrapha and apocryphal gospels to Jesus Research is limited.
Source: wiktionary
Hofius further concludes that the evidence of the agrapha militates against the view that the early church freely invented dominical sayings.
Source: wiktionary
The agrapha, or noncanonical sayings attributed to Jesus, are probably less reliable than the non-Christian sources on the life of Jesus.
Source: wiktionary