What Can an Answer Engine Actually Quote From Your Page?

Only what is present, self-contained and legible in the HTML the server sends before any JavaScript runs. An answer engine lifts a passage it can use without the surrounding page, so a quotable passage has four properties: it answers the question in its first sentence, it repeats the subject instead of relying on "it" or "this", it carries its own qualifiers so it is still true when pulled out, and it sits in server-rendered text rather than inside an image, behind a tab, under an accordion or assembled by client-side script. You can test all four by hand in about ten minutes with two commands and no tools. Fetch the page with curl and no JavaScript, strip the tags, and read what is left: if your answer is not in that text, no model can quote it. Then run the question itself through ChatGPT, Claude, Perplexity, Gemini and Grok without your brand name in the query, and record which URL each one cited. The gap between what your HTML contains and what the engines actually quoted is the work.