I just watched the show and the so called same script was not the same. Does he think people are blind? The th had an underline (th) and was the same height (on the same line) as the rest of the sentence. That is not the same as the documents in question.

Why didn't Rather disclose Benton's daughter who said he was lying?
Why didn't Rather disclose Killian's son and wife who said there is know way Jerry Killian would do those things said in the documents? He barely knew how to type.

Saying the type has been available since 1931, is like saying computers have been around for decades. They have but not everybody used them.

The segment was a joke and bias.