When you reach a primary source? If I can't get a cheap, reliable answer to a simple question without looking into a potentially dense primary source, then online search becomes about as useful as a library card. Besides, not every domain is expected to include primary sources. Did the author of this recipe really think that a wok is better than a skillet for fried rice, or is this the written delusion of a gemerative AI?
Do I instead only look for answers found in reputable sites? Aggressive SEO has made badly formatted sites indistinguishable from GPT sludge. Personally, I don't trust answers from sites I haven't heard of before my search.