“I do all my own research,” she said, “though reviewers have speculatedthat I must have a band of hirelings. I like to be led by a footnote ontosomething I never thought of. I rarely photocopy research materials because, for me, note-taking is learning, distilling. That’s the whole essence ofthe business. In taking notes, you have to discard what you don’t need. If you[photocopy] it, you haven’t chewed it.”
Sounds similar to Umberto Eco's admonition about photocopying: https://hypothes.is/a/U3Sg_r0ZEe25T2tD3U-nmw