SCI papers are both theoretical and experimental. All papers need to be reviewed. For some papers published in top journals such as Nature and Science, it is difficult to falsify them in theory.

Wiles, a British mathematician, proved Fermat's Last Theorem, but found that there were loopholes in the proof and it was not published. Wiles spent a whole year fixing this loophole, during which he almost gave up several times. Finally, after fixing the loophole, he published his paper in the Mathematical Yearbook.