Yesterday I needed to take an unstructured document with about 1,200 timestamps and substract 1 second 550ms from each of those.

I could have written code for it, but Claude output a perfectly valid HTML page I could locally paste my document in, which gave me the accurate output I needed.

This is knowledge work.

Today I had another document, about the length of a small book, where H3 and H4 titles were mistakenly provided in the wrong language. I needed those 159 titles to be changed while preserving the rest of the document, with a very specific maximum word count per title. Claude did this with a single natural language prompt. (though I had to tell it to "go on" every couple hundred lines)

This is also knowledge work. Knowledge work is not generating new knowledge, just like manual work isn't about generating new hands.