Given a paragraph about cooking, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix 'Q:' followed by the answer prefix 'A:'.

CONTEXT: The term is not really defined that way. In the strict sense, it only has meaning for lean doughs - made of only flour, water, yeast and salt, eventually preferments or later mixins like seeds. You can extend it to enriched doughs (those that have fat, milk, eggs, tomato juice, etc.) but then it is no longer sharply defined. Calculating the exact content of water (e.g. adding to the calculation 17 g of water for every 100 g of butter) are pretty useless, because the water bound in an emulsion or other kind of colloid doesn't behave the same way as free water when making a dough. So, a dough with 100 g water and 100 g butter will be extremely different from a dough with 117 g of water, and still pretty different from one with 117 g of water and 83 g of oil. So, there is no real formula any more to create an actual percentage. The concept still stays somewhat useful in this case, but you have to "play it by ear". When you are trying to judge how soft a given enriched dough will be, you can start by calculating all the liquid and fat ingredients as if they were "hydration", which gives you a rough guide to compare it to other doughs, and then you have to make it and gain a tactile understanding of how it actually behaves. <sep> Q: What counts as "hydration" when figuring Dough Hydration? A: The term is not really defined that way. In the strict sense, it only has meaning for lean doughs - made of only flour, water, yeast and salt Q: do we count things like sour cream, butter, milk, eggs? A: the water bound in an emulsion or other kind of colloid doesn't behave the same way as free water when making a dough Q: Do we count just water/liquid? A: for lean doughs
Does anything else factor in to the hydration of the dough?

CONTEXT: Nutrition itself is off-topic. However, keep in mind the following:There are many compounds in tea leaves and some dissolve early, and some a little later. At some point (around 5-10 minutes of steeping at ~95C), you will lose majority of the 'good stuff' and continue picking up less desirable compounds. You will notice that while colour might persist, the taste will be come less and less desirable. In some cultures re-using tea leaves is considered a faux-pas because of this.If you find your tea to be too strong after steeping, the best thing is to reduce the amount of leaves for the next time; as opposed to steeping them multiple times. <sep> Q: Steeping green tea leaves - how many times can I steep them, and do they lose flavanoids over steeps? A: At some point (around 5-10 minutes of steeping at ~95C), you will lose majority of the 'good stuff' and continue picking up less desirable compounds
How many times can I use the same tea leaves?

CONTEXT: In a cookbook that old, the sour cream referenced is probably a home-fermented variety, used as a preservation method in the days before widespread home refrigeration. You can still do this with the appropriate bacterial cultures, but most of us now buy our sour cream at the store instead. That product is similar, but made in much larger batches with a highly standardized, refined bacterial culture, producing a product with a predictable sourness and texture. Home-cultured versions are more variable, but they use similar processes on a much smaller scale.Whether you want to call this the "same" is partly a linguistic distinction that depends on how much you want to consider the differences in scale and equipment between pre-refrigeration and modern methods.In contrast, the addition of something sour to cream is really a substitute, used when you don't have a proper sour cream available. A cook back in the 1890s could use the same substitution then as we might today. But the production of sour cream (and all sorts of fermented milk products, such as yogurt and kefir) is much older than that, and there would have been some variety of "traditional" sour cream available, though not universally or year-round in the days before mechanized food distribution systems. <sep> Q: Is sour cream in olde recipes the same as sour cream today? A: the sour cream referenced is probably a home-fermented variety, used as a preservation method in the days before widespread home refrigeration
How would I make a home-fermented variety of sour cream?