Nobody can poison us NOT to believe that the sun or the moon Exists. If that is so, why does an argument against God or the WT so powerful and devastates faith?
Bingo!
There are thousands of people who believe the earth is flat and they have written hundreds, thousands, who knows maybe millions of pages of "evidence" as well as websites, videos, etc.
I can read their literature for hours, days, years on end and it won't change my certainty about the shape of the earth.
If someone's faith is so rickety, so tenuous, so utterly fragile, that even 15 minutes exposure to a contrary idea is enough to destroy it, what does that say about the viability of whatever that person has faith in?