We shouldn't stop at that. If you actually try to apply your knowledge of “real shape of the Earth” to your regular activities (say, checking the ground level c

We shouldn't stop at that. If you actually try to apply your knowledge of “real shape of the Earth” to your regular activities (say, checking the ground level correction before making each step), you become thrice wrong. Confusing models of reality with reality is a sure way to get to the madhouse (I am sure there are stories about people thrilled to the core by the reality of being placed on a giant rotating ball instead of just the concept of the same). At the same time, it's something we all do each moment.