Skeptic - do you have any proof, evidence or falsifiable hypothesies that we can investigate?
well, if something happened to defy the basis model (sun rising in the wrong place, coriolis force remaining in the same direction over the equator, the pole not being a magnetic center, etc), that would be one.
a more testable example i've given multiple times would be vertical refraction. if you can measure how light refracts over some altitude, taking measurements, dual earth theory predicts that there will be jumps, and not a smooth progression. this is due to aetheric whirlpools.
let me ask you the same. do you have any falsifiable hypotheses for your round earth theory?
Off the top of my head:
Coriolis force - check
Sunrise and sunsets - check
Sunrise and sunset angle determined by latitude - check
Circumpolar stars at North and South pole - check
Magnetic field line parallel to ground along almost all latitudes - check
Minor bulge at equator - check
Flight times to multiple trans-continental destinations - check
Operation of equatorial telescopes by professional and amateurs across the globe - check
Longer days and nights during summer and winter at different latitudes - check
Orientation of star fields and moon at different latitudes - check
Measurement of earthquake waves across the globe - check
Plate tectonics and volcanism - check
Timezones - check
Orbiting spacecraft - check
Horizons and appearance of objects at distance - check
Exact predictions of eclipses - check
Measurement of gravitational variance across the globe - check
Actual verifiable evidence of aether and aetheric whirlpools - Absolutely none whatsoever
Actual verifiable evidence of the sun locating inside earth - Absolutely none whatsoever
As for your vertical refraction, this is simply caused by density variations in the air, as the sunlight passes through, resulting in changing refractive index and therefore slight distortions in the suns disc as it approaches the horizon. You'll notice that this does not happen when the sun is high in the sky. Surely, if your cause of whirlpools was correct then the refractive effect would occur across the entire sky....?