Can anyone be sure that this is the same Peter who experienced Jesus because the letter that is attributed to him Christian scholars have disputed?

The demonstration is based on faith alone? No other knowledge? Experience? Authority? Science?
What do Christian authorities say--scholars?

Here is a chart of disputed books of the Christian text {Jews and Christians alike will find this interesting!}
www.bible-researcher.com/canon5.html
The site is interesting and is not designed as evangelical.

Geez! Father K has retired from the college that I attend, he would provide a great historical background for me. I miss the guy--such a good man and good Christian and secular scholar. I enjoyed his World Relgions class so much.