Has the term "crash diet" ever really been raised to any kind of status that is attached to objective measurement? That would be interesting if so. If a crash

Has the term "crash diet" ever really been raised to any kind of status that is attached to objective measurement? That would be interesting if so. If a crash diet description involves averaging, especially in the 1200 zone and over several weeks, to me that's less of a crash diet and more of an emergent norm that ought to be figured out quickly. Is this person reading /r/1200isplenty, or are they completely depressed, or what? The details are interesting and relevant. If I had to model-ize crash dieting I'd start with something like a caloric deficit > 20% below TDEE, attempted multiple times, combined with the outcome of not meeting or maintaining target weight goals.