Our idea of the birth of the Universe through the Big Bang is only our limited idea about the Universe and not a real explanation of the Universe itself as it may be and not as we think it is. Therefore, we would have to define, in the first place, what a real Universe is. We have to determine whether we can always use our ideas about the Universe as a basis for understanding the Universe. But, if we are not sure we understand, or know with certainty, or at least to a high degree, what a real Universe is, in its totality, known and unknown to us, then we must think about it more hypothetically.
“Our idea of the birth of the Universe through the Big Bang is only our limited idea about the Universe and not a real explanation of the Universe itself as it may be and not as we think it is. Therefore, we would have to define, in the first place, what a real Universe is. We have to determine whether we can always use our ideas about the Universe as a basis for understanding the Universe. But, if we are not sure we understand, or know with certainty, or at least to a high degree, what a real Universe is, in its totality, known and unknown to us, then we must think about it more hypothetically.”
— Dejan Stojanovic · Time