When encountering flat earthers, m'gunna start stitching in concepts about square telescopes and round view screens with a straight face for the fun of it.

"Ya know, it is just the outside that looks round, internally its all translated as rectangles and squares, only the lenses make all the planets look round. Especially the high powered ones."

"Dude did you hear monitors all emit a 360 energy cylinder that numbs people into believing the BS, yea monitors are round."

Wait, that second one could pan out some day, but it would be trapezoidal, file it under out on a limb or far out screen play.

Have you heard the one about lithium...