I never learned peer review as anything more than others in the field reviewing the paper and confirming it meets standards. Its like logic vs truth. Peer review is like proofreading. Is the structure of the experiment proper. Is there controls. Is the statistical analysis proper. so on and so forth. Honestly though science is dependent on replication which used to be a sort of competition so it worked. Oh you think this is this and this is how you proved it. Well I will see for myself and I will lambast you if it does not work. It was kinda personal with the field before modern times. Competition was very direct. Now no lab wants to do anything but something they can say is new and a discovery. I feel at least 50% of public science funding should be for experiment replication