Philosophy Wire by Spiros Kakos [2014-09-28]: The gurgles of the stomach are not caused by the stomach but are the result of a signal sent by the brain. 
So it is not the stomach.
It is the brain.
There you do. Puzzle solved.
But IS it solved?
What causes the brain to cause the stomach to gurgle?
Find the cause of the cause and then the cause of that cause and so on...
Where do you stop?
Knowledge based on laziness.
Accept no limits.
Try to know everything. And only then will you finally know you know nothing...
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