Just all are clear........"
Pseudepigrapha (also
anglicized as "pseudepigraph" or "pseudepigraphs") =
falsely attributed works.
Now I must say at this point, your argument does in fact spring from Skepticism. Of the 13 productions of Paul, 7 are undisputed. Of the 6 left
Skeptics of the disputed letters hold several reasons for their disbelief.
First, they claim that the history presented in the disputed letters do not match what one finds in the book of Acts.
Second, the vocabulary, it is argued, is much different in the disputed letters than in the undisputed letters of Paul.
Third, skeptics argue that the development of church structure is more advanced in the disputed letters than the undisputed letters; doctrinal issues seem to point towards a later date (including some apparent allusions to Gnosticism); and the stylistic differences between the undisputed and disputed letters all illustrate their cause for dismissing Paul as the author of the disputed texts.
Now whether Paul personally penned an epistle or had someone write it down for is not the issue! The most important fact to take notice of is i that all thirteen letters received approval from those closest to Paul when they were presented and read at those churches!
If the letters had not actually been written or dictated by him, then those men OF THAT DAY would have rejected them then and we would not be having this discussion today.
Again, just to make sure we are all on the same page lets consider the word......"Amanuensis" which means .....
a literary or artistic assistant, in particular one who takes dictation or copies manuscripts.
Many years ago when I first learned the scribal practices of the amanuensis, it was realized the stylistic differences in the different Pauline epistles were easily resolved. One may see stylistic differences even among the undisputed letters of Paul for the same reason. An amanuensis was a scribe who penned a letter as the author was dictating the message to him. The amanuensis would read back the letter to the author to ensure the message was as the orator desired. Scholars have noted that amanuenses were often allowed some liberty in the structure of their writing so long as the message was preserved.
As for the Book of Hebrews author. I do not know and I do not care. Some say Paul, some say Luke and some say Barnabus. I say the Lord Jesus Christ!