Now, there is a poem by Ronald Knox,
"God
Must think is exeedingly odd:
If he finds that this tree
Continues to be
When there's no one about in the Quad."
An "anonymous" reply is
"Dear Sir: Your ashtonishment's odd:
I am always about in the Quad.
And that's whay the tree
Will continue to be
Since observed by
-Yours faithfully
-God."