Arguments for God's Existence from Contingency

[The Grand Nudger]

The universe exists because it exists. Whether it is necessary is immaterial.

The above -is- a statement of a necessity of x's nature.  The categorization as such is only plainly useful when considering things that aren't necessities of x's nature.  For example..the universe necessarily exists, or, if you prefer "the universe exists because it exists, or "it just is".... but it may not have and need not have existed -as it is today- or -as we know it-, necessarily.  

I know it seems like a strange and extraneous bit of classification..but necessity has surprising consequences for things and statements we take to be true.  For example...if it is necessarily true that:

"If a ship sinks tonight, there will be a report about it tomorrow", then by transposition  "If there will be a report about it tomorrow, a ship sinks tonight" is also true.

A subtle inversion of causality as we see it.   The one is intuitive and seemingly inarguable, but it's equivalent proposition by necessity seems to imply something we find intuitively wrong.  There are explanations for the above, btw, I offer it only as an elaboration on why the category of necessity is useful (and because it's my favorite example of how conditional statements can go south).

Hell, the explanation that satisfies our intuition to object -necessarily- invokes necessity.  Mechanics ftw.