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Scientific unprogress...
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A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
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Actually the physics model to use is typically the simplest one that works, i.e. that gets the job done.
When your job is to drive a truck to the nearest city, the curvature of the Earth is negligible and it's simpler to assume that the earth is flat, so that is the model that you should use.
As such, yeah, for 99% of use cases, the earth is flat.
Did you just "UHM ACKtually the earth IS flat!"
If your truck is equipped with GPS then the Earth had better be round in your physics model.
How does a flat earth model simplify logistics?