Do You Believe in Flat Earth?

Explaining Is Harder Than Believing

Do you believe in the Flat Earth theory?
Probably not.

But how would you convince someone who does?
You might show them a picture of the Earth as a sphere.
But what if they believe that the photo is fake?

Then you would have to explain something deeper —
for example, the phenomenon of tides.

Why does the sea level rise and fall in a predictable cycle?
Why is that cycle about 12 hours and 25 minutes?
Why do some regions show one cycle per day while others show two?

These patterns only make sense if the Earth is spherical —
shaped by the gravitational pull of the Moon and the Sun,
combined with the centrifugal force generated by Earth’s rotation.
A flat-Earth model cannot account for any of this.

But here is the real question:

If you cannot clearly explain these tidal phenomena yourself,

then how do you know your belief is grounded in accumulated knowledge —
and not simply obedience to authority?