Hydra, aside from not being able to say exactly what fuzzy logic is, I am confused. You write: his description corresponds to the Codex Tchacos Gospel . Where did this information come from? Elsewhere in the material you quoted from?

As far as "Given the fact that the Gospel of Judas Irenaeus is discussing is certainly not a work written within the group of Irenaeus's opponents, given furthermore that he does not seem to have personal knowledge of it, but is only reporting what he knows from hearsay, a link between the new Coptic text from Codex Tchacos with the Gospel of Judas known from Irenaeus's account seems to be justified." goes, let me see if I can clarify for myself the facts:

1.) Gregor Wurst is writing about "The Gospel of Judas"'
2.) he's saying it's the same one St. Irenaeus wrote about; and,
3.) he's saying it's the same one because it definitely wasn't written by Irenaeus' enemies nor apparently by Irenaeus himself, and therefore it must be the same Gospel.

Given the sentence you quoted, my #3 certainly does not constitute even a reasonable assumption, let alone proof. However, given your added statement about several points coinciding, that could change the picture entirely.