We, scientists, love to measure things so we invented a way to measure the relative importance of different journals: impact factor. For example, Nature has an impact factor of 42 meaning very roughly that each article will have 42 citations two years after its publication. Nature only has a publication rate of 7% of submitted papers and most papers are rejected before even proceeding to the peer review step. Peer review which is often anonymous can be an infamously difficult part of the process. However, it is the job of peer reviewers to question and investigate the author’s claims.