There are, but, quoting from the article:

> Anthropic said: "None of our data acquisition programmes buy and destroy rare or antiquarian books."

This statement was clearly carefully worded, using the words "rare or antiquarian" to mean "pre-1966, pre-ISBN". Their statement is answering a question that wasn't asked, so that (if they need to) they can claim in the future that they never said they weren't destroying books with ISBNs.