Given a paragraph about cooking, and a set of conversational questions and answers about the paragraph, say whether the passage contains sufficient information to answer the follow-up question. Say Yes if it is answerable; otherwise, say No. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`, and the follow-up question has a prefix `FOLLOWUP_Q:`.
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Question: CONTEXT: Rendered pork fatâmanteca de cerdoâis our preferred cooking fat throughout this book. Lard has a relatively high smoke point so it is ideal for frying, and it provides a richness, dimension, and distinctly Mexican flavor that you just can't replicate with using other fats...Vegetable oil is a fine substituteHowever specific recipes may really need lard: Note that the flaky texture and slight richness that make flour tortillas so compelling are derived from lard. I've found that vegetable shortening is a poor substitute here...Source: Alex Stupak and Jordana Rothman. "Tacos: Recipes and Provocations".  <sep>  Q: Why use lard in tortilla dough? A: the flaky texture and slight richness that make flour tortillas so compelling are derived from lard  <sep> FOLLOWUP_Q: why does the lard cause flaky texture

Answer: No


Question: CONTEXT: Flour (+ water, either directly or from other ingredients such as egg white) gives the pastry structure. As you knead the flour, the gluten network develops and results in elasticity. When cooked, water evaporates from the dough leaving a rigid gluten skeleton. Fat does not mix with water and thus stay in blobs in between the gluten network. This weakens the gluten structure, making the pastry crumble.For this reason, you often see in recipes for shortcrust to avoid overmixing the fat. Buttery biscuits such as shortbread crumble more than crackers, which have more water. The same rationale applies to puff pastry. The thin fat layers are impermeable, so water steam gets trapped and exercise pressure upwards, lifting the pastry up.Quoting @GdD in the comments, the punchline is:more fat = crumblier, less fat has more structure.  <sep>  Q: How does altering the fat-to-flour ratio affect the pastry? A: more fat = crumblier, less fat has more structure  Q: Is it only crumblier after it bakes? A: The thin fat layers are impermeable, so water steam gets trapped and exercise pressure upwards, lifting the pastry up  Q: Does the type of flour effect the mixture? A: Flour (+ water, either directly or from other ingredients such as egg white) gives the pastry structure. As you knead the flour, the gluten network develops and results in elasticity  <sep> FOLLOWUP_Q: Can you knead the dough too much?

Answer: Yes


Question: CONTEXT: I have seen this happening more than once. While I don't know the whole theory behind it, each time it happened, there was something just below the hole, let's call it "the lump". What I think happens is that the lump is too heavy. When the batter below it tries to rise, it doesn't have the strength to push up the lump. This could be combined with differences in heat transfer throughout the batter vs. on the batter-lump transition in preventing rising (I am certain they exist, but I don't know whether they have an effect at all). The result is a hole where the batter didn't rise, surrounded by nicely risen batter. As to where the lump comes from: you say "chocolate and pear cake". If you have pear pieces in the batter, right under the surface, they can do this. I have certainly seen it happen when the recipe includes fruit pieces in the batter. If there are no pear pieces, my second guess is badly dissolved flour. The directions for this type of cake normally include folding the whites very gently, and generally erring on the side of too little whisking. This could contribute to uneven batter texture, resulting in lumps. In the second case, the cake may have some less-than-pleasant pieces, but will still be mostly good. If it is fruit, the holes are purely a cosmetic problem. So not much harm done either way, unless you are shooting for a prize at a baking competition.  <sep>  Q: I baked a chocolate and pear cake whose batter is made with yolks, sugar, butter, melted chocolate and amaretti, flour and baking powder and whisked whites. It was (not very evenly) divided in two layers, sandwiching a layer of pear pieces pre-cooked in rum.### My question is: what are the holes due to? A: I have seen this happening more than once. While I don't know the whole theory behind it, each time it happened, there was something just below the hole, let's call it "the lump  Q: Uneven division of batter? A: What I think happens is that the lump is too heavy. When the batter below it tries to rise, it doesn't have the strength to push up the lump  Q: How can this be prevented A: folding the whites very gently, and generally erring on the side of too little whisking  Q: Any other suggestions? A: there are no pear pieces, my second guess is badly dissolved flour  <sep> FOLLOWUP_Q: Could using a better source of flour work?

Answer:
No