Refuting the Flat-Earth theory

[FlatAssembler]

I don't think that's a good argument, for three reasons.
You don't see from those two skies that constellations shift but have a constant shape. Constant shape of constellations is important, as it demonstrates that stars do not shift simply because they are close to us.
Also, how clearly can you even see stars during a polar day? When it's polar night on the North Pole, it is a polar day at the South Pole.
Also, many Flat-Earthers claim much of what we think we know about Antarctica is a part of the conspiracy.

I don't find your arguments convincing enough to refute.

OK, whatever. I used to be a Flat-Earther, so I am one good data point about how they think and what they might find convincing.