A wise man knows when to stop arguing, and let the ignoramus remain an ignoramus.
There was a time when wise men realized that the Earth was not a flat plate. Their opponents would not accept the proof that was presented because their egos blinded them to the proof being presented.
Nobody will ever convince Mr "Smith" that he's been duped .......
We've been through this with you multiple times. The spherical earth was mainstream since the ancient Greeks (who calculated, as best they could, the world's circumference). The Catholic Church has on the top of ceremonial staffs a globe, representing the earth.
"The myth that people in the Middle Ages thought the Earth is flat appears
to date from the 17th century as part of the campaign by Protestants
against Catholic teaching. But it gained currency in the 19th century,
thanks to inaccurate histories such as John William Draper's History of the
Conflict Between Religion and Science (1874) and Andrew Dickson White's
A History of the Warfare of Science with Theology in Christendom (1896).
Atheists and agnostics championed the conflict thesis for their own purposes,
but historical research gradually demonstrated that Draper and White had
propagated more fantasy than fact in their efforts to prove that science and
religion are locked in eternal conflict."
It's the dishonest contrarians who promoted the "flat earth" conspiracy theory to undermine authority and reason. The modern equivalent is the JFK Conspiracy Loon or so-called "Skeptic/disinterested observer".