They claim that since the latter part of that book spoke about things known to have happened after Isaiah's death, it must have been written by someone who lived during that time.
So, the seminaries are actually helping to perpetuate the idea that some of the book is not actually prophetic at all, but were more like a commentary of current evens from pseudo-Isaiah’s perspective.
“Most seminaries teach of there being two people as authors of the book of Isaiah. The first one is actually Isaiah, and the second one is called pseudo-Isaiah”
Most (liberal) seminaries teach of there being two people as authors ...
“So, the seminaries are actually helping to perpetuate the idea that some of the book is not actually prophetic at all”