An Allegory —
Most of the time you can see a hundred miles from the top of Hogback Mountain. Often, however, the view is obscured by the weather. Once in a while there is what is called a “white out” and you can’t see anything at all. Somewhere between all clear and white out it is really best to stay home. Unfortunately, it is often hard to tell the difference until you are right there in the thick of it …
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“for after all it’s more important to know whether there will be weather than what the weather will be”
From “The Phantom Tollbooth” by Norton Juster