So, what the author is saying is that based on a purely linguistic analysis of language and content the fragment is probably a modern forgery. Given that this Harvard professor can give absolutely no provenance for the fragment the probability that this is a fake goes off the charts.
“This is most probably the compositional procedure of a modern author who is not a native speaker of Coptic.”
“So, what the author is saying is that based on a purely linguistic analysis of language and content the fragment is probably a modern forgery.”
An experienced translator can spot such things.