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This reminds me of my old physics assignments:
"Assuming a perfectly spherical cow...."
I want to hear more about this perfectly spherical cow question.
This is a joke ntended to illustrate the sometimes absurd oversimplification that has to be made to do certain calculations. An apple falls out of a tree from 20 feet off the ground, how long does it take to hit the ground. Well, what is the drag coefficient? Assume it's a sphere. OK, what about the texture, the air temp, wind, is the ground level and flat, etc etc. And as the problems increase in complexity the number of variables increases exponentially. So your professor might tell you to "Assume it is a spherical cow of uniform density“.
Often these estimates are actually quite good and trying to account for all variables isn't needed.
Sounds like fun. There's going to be that 1 grad student who is like, but how close of approximation is it really and can we use other knowledge to fine tune it... I'm going to launch a cow with a trebuchet and get some better answers.