Beyond that, I'm pretty sure none of us, you included, possess the vaguest idea what or how it happened or if will it happen again.
The news of Bonaparte's signal victory over the Turkish army at Aboukir aroused general rejoicings undimmed by any save the vaguest rumours of his reverse at Acre.
At the time, Tolkien had only the vaguest of ideas what a hobbit even was.
No one was able to guess, even in the vaguest way, the exact interpretation of these odd characters; but, on the other hand, no one could doubt that they constituted a system of writing, and that the piles of inscribed tablets were veritable books.
Until the beginning of the 19th century there existed no other knowledge of the actual area and population of the country but what was given in the vaguest estimates.