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A good analogy no doubt! But you should be careful when using analogies. Every behavior of the analogy might not be applicable to the original problem.

Analogies can only help make people "understand" something. Normal brains try to relate things to what it has learnt so far. So analogies seem to help. Analogies in themselves are not scientific explanations obviously.

A scientific/rational explanation to the question posed by the user would be - C++ makes no promise about the behavior of the program when out-of scope C++ variable is used. Obviously this explanation -a simple one is quite less dramatic.

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