Einstein's greatest contribution to humanity is the proposal of relativity, which is a powerful tool for humans to study the universe. Einstein calculated the mass of the universe through relativity and found that the total mass of the universe turned out to be zero. Einstein believed that the matter produced by the universe after the Big Bang has two forms of positive and negative, antimatter and positive matter are completely opposite, and the positive and antimatter are of equal mass. But scientists only found a small amount of antimatter in the universe, where did most of the antimatter go? If they do not exist in the universe, Einstein's calculations of relativity will not find that the total mass of the universe is zero, but the mass of the universe is zero, which indicates that antimatter should still exist in the universe. Which of the following _______ items are the premise assumed by the above discussion. ['There is only one universe.', "Einstein's calculation through relativity is correct.", 'Humans cannot conduct interstellar exploration if they cannot use the tremendous energy of antimatter.', 'Scientists have discovered antimatter in the laboratory and can now also make some antimatter in the laboratory.']