I remember reading this article on how this group of flat earthers had pooled together to buy this incredibly expensive device, that had been laser calibrated. I think I recall being some sort of gyroscope that, if the planet was truly a sphere, would record on its inclination the degrees it would shift in order to maintain perfectly balance . The group had also did the math and they had reached a value that would be expected to be measured if the Earth was truly a sphere but it was immediatly rendered impossible because the device would never record such deviation as the Earth was flat.

Can you guess where this is going?

The device measured the exact figure the group had calculated. With no margin of error. And repeating the experiment only returned the exact same result. They had, by their own standard, reached proof the Earth was not flat.

Their conclusion?

The device had been sabotaged.