I need help proving flat earth is real, please explain how GPS works without a system of satellites orbiting a globe as illustrated in the attached link!

Excuse my ignorance but I’m at a loss to explain GPS.

“https://reddit.com/r/FlatEarthIsReal/comments/15rhw2o/i_need_help_proving_flat_earth_is_real_please/”>View Reddit by TimKing25 – View Source

Nathaniel J Gillis: Are Aliens Actually Demons? | The Higherside Clips