[george wythe]

Good points from Fox:

Unique letterhead on CBS memos

Use of superscript mostly not available at the time on 1970s typewriters

The wording does not match previous documents written by the purported authors [Authors of the CBS memos have been conveniently dead for decades]

[Lancey Howard]

Use of superscript mostly not available at the time on 1970s typewriters

Believe me, the military wouldn't have gotten its hands on "1970s typewriters" until about 1990.

[Diogenes]

I bought a state-of-the-art IBM Selectric in 1975, equipped with the 'works', and it didn't have the superscript 'th' as shown in the documents Dan Rather/CBS presented last night! I am almost sure this is a big, big fake!