The spheroid earth is not demonstrable.

Every experiment designed to detect the curve of the earth has failed.

There was this astronomer who placed flags along this canal that is five miles long and straight.
He went to the end and looked down the row of flags and found them all level. All in a straight line.

We can see light houses over the (supposed) curve of the earth.
These are number written by government in government handbooks.
And the math shows that they should not be seen at that distance, if they earth is curved as commonly stated.

I can continue, but will stop here.

The seismic studies do not show a molten core. What they show is very weird, and many people are trying to marry what they see (data) with the globe earth, molten core model. And they are failing.

The Russian Bore hole made it down 8 miles, and then ran into a slurry that they could not drill through.
By our current model, water should not exist 8 miles down. But it does.

The only real evidence that the earth is a spheroid comes from NASA photos... and almost all of them are digitally created. Photoshopped.
Further, there is video evidence of NASA faking the ball earth photographs.

The only conclusion is, "i don't know what the shape of the earth is"
But i know i have been lied to.