Religion is false.

Proposition: Religion is false.

Proof:
By way of contradiction, assume religion is true.
Let R be the set of families of all religious people.
By our assumption, R is nonempty. So there is an element, say r, in R.
By definition, r is not integrable*. (1)
Now observe that r is differentiable**. (2)
Recall the theorem:
For any f, if f is differentiable, then f is integrable.
So (2) implies that f is integrable. (3)
But then (1) and (3) contradict each other.
Hence our assumption that religion is true must be false.
Therefore, religion is false.
QED

* i.e. cannot be integrated to the system
** i.e. one can diffferentiate a religious person from a nonreligious one.