About "Nothing comes from nothing"

The following is the definition of "Nothing comes from nothing", I got it from Wikipedia.
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From Wikipedia, the free encyclopedia

Nothing comes from nothing is a philosophical expression of a thesis first argued by Parmenides, often stated in its Latin form: ex nihilo nihil fit. Today, the idea is loosely associated with the laws of conservation of mass and energy.
In logic, nothing is represented by the empty set, and it is trivially true that no thing (any defined concept or element) can be extracted from such a set. Other definitions of nothing are based on the negation of being (this is discussed by Heidegger for example), and with such a definition anything that doesn't yet exist and isn't completely determined does come from nothing, in an equally trivial sense.