How the principle of "whoever is stronger wins" works

Is one allowed to visit a Jewish doctor on Shabbat in a non life-threatening illness situation?

Is it a mitzvah to take an oath? Is it preferable to find a compromise?

Are two litigants allowed to go to a 2nd court for another opinion after receiving the psak/decision of a first court? Would that constitute contempt of court?

Promising to compensate a fired worker an exorbitant severance not expecting to actually have to pay that amount and then being asked to pay it. Is the employer required to pay?

Building beautiful homes outside of Israel: Is there a mitzvah?

It's not enough to just live and work on an abandoned piece of land- what else is required?

Is it permissible to plant trees or flowers in a Jewish cemetery/on the graves themselves?

When the public use a private property as a shortcut, can that right be taken away from them?

Is the earth round or flat and what this has to do with the prohibition to build Temple vessels in the dimensions of the original