The KEP does two things. It demonstrates the the papyrus found in 1967 is THE one Joseph Smith and scribes supposedly translated into being the Book of Abraham (even though as enabled by the Rosetta Stone, Egyptologists agree that there is nothing on the papyrus that matches up with the Book of Abraham story). The KEP proves it was a linguistic translation that Joseph Smith and scribes were attempting, taking characters in one language and creating corresponding text in English. That is, the KEP proves the Joseph Smith was trying to pass off the Book of Abraham as a translation as that term was then and now is ordinarily used and understood, just as Joseph entitled and introduced it:
THE BOOK OF ABRAHAM
TRANSLATED FROM THE PAPYRUS, BY JOSEPH SMITH
A Translation of some ancient Records that have fallen into our hands from the catacombs of Egypt. The writings of Abraham while he was in Egypt, called the Book of Abraham, written by his own hand, upon papyrus.
The problems with the Book of Abraham being what Joseph Smith claimed are legion. The problem posed by the KEP, as explained above, is just one--one that alone dooms Joseph Smith's claims for what the Book of Abraham is and its source.
The Book of Abraham is for those that take an honest look at it, the rabbit hole down which one starts to find all the wondrous realities.
