It is indeed an interesting speculation by which scenario an unfalsifiable belief - like the faith of some bible believers - could be overcome. Certainly not by reality or by logic, otherwise the belief would be falsifiable. But how about the following hypothetical scenarios?

a) Archeologists discover the original of the bible, and find that it on the last page contains a statement "This book is wrong".

b) The Lord himself appears in a blinding flash of light, a heavy document folder under his arm, and exclaims "Sorry - the bible was published a little too hasty. Here's the correction!".

Would this make hard-core bible believers get second thoughts?