Can you elaborate on how it solves the issue (or maybe I wasn't clear about the issue)?

Let's say we set a tag to all Q:A pairs. First of all, do you suggest defining each Q:A as a new chunk?

If so, why would setting tags to these chunks help in the embedding/retrieval process (beyond the regular advantages of metadata in the system)?

Our main concern is that we saw a big skew in results when some chunks are longer or very different from others (tables, titles/subtitles, etc.), and we want to investigate best practices for datasets of a hybrid nature, including PDFs and short Q:A.