Stephen Hawking, a theoretical physicist, said: "Because there is a law such as gravity, the universe can and will create itself from nothing."
Because there
is something, that is, the law of gravity, then the universe can and will come from nothing. Now firstly Hawking asserts the existence of something, and because of that existence this is proof that the universe can and will create itself out of nothing.
This was one of the world's leading scientists.
The word science comes from Latin "scientia," which means knowledge. The words knowledge and science are synonyms. Knowledge is facts, truths, realities that is acquired by observation and personal experience.
The statement quoted above is known as a paradox. A synonym of paradox is contradiction, or nonsense.
When a statement such as "something pretty mysterious had to give rise to the origin of the universe" and that that "something" is "literally nothing" we are equating something with nothing.
Now if we say that x creates y we presuppose that x already exists. If we say x creates x we have created a paradox, or a contradiction, or nonsense. The so-called "pull yourself up by your bootstraps." That is where a man is going to pull himself up by pulling on his own bootstraps.
So to those that adhere to the teachings of scientists such as Hawking. How is it that No-thing = Some-thing?