You're underestimating how much things have changed in the last 30-50 years. Manafort knows how to use common Office programs like Microsoft Word and Excel. The

You're underestimating how much things have changed in the last 30-50 years. Manafort knows how to use common Office programs like Microsoft Word and Excel. There's a pretty good chance that he's even somewhat skilled (by his standards) with Excel or at least that he's experienced. He may have understood from reading about it in the past that document files can save a history of changes, and he knew to some extent the difference between a document and a PDF. None of that means that he actually understands what is happening behind the scenes. Odds are good that his college exposure to computers was limited to Hollerith cards used for registration. Put differently, Manafort is from the generation that indents in word processors by hitting space 4-5 times.