The question of what happened at the very beginning of the universe is still an area of active scientific research and remains a subject of theoretical investigation. The prevailing scientific model, the Big Bang theory, describes the expansion of the universe from an extremely hot and dense state, but it does not address the precise origin of the universe or what might have occurred before the Big Bang.
Regarding the concept of "something coming out of nothing" or "nothing coming out of something," these notions are highly philosophical and metaphysical in nature. In the realm of science, our understanding is primarily based on empirical evidence and theoretical frameworks. The fundamental principles of physics, as we currently understand them, are not equipped to explain the state of the universe prior to the Big Bang.
It's important to note that notions of "nothing" and "something" can be quite complex and can vary depending on the context. In physics, even empty space is not truly empty but is subject to various quantum fluctuations and fields.
In summary, the question of what existed before the Big Bang or how the universe originated is still a subject of scientific inquiry and speculation. It is an area where scientific knowledge is limited, and different hypotheses and theories continue to be explored.