Аннотация:In their recent article in this journal, Vachon et al. [1] review terminology for replication research. They propose a 119-word definition which includes four continuously scaled attributes, namely 1) amount of planning of the replication study, 2) distance between the investigators, 3) similarity between the research questions or hypotheses, and 4) compliance with the methods. First, we will scrutinize their definition and the four dimensions they distinguish. We subsequently describe our own views on what replication studies are, why they are important, when irrelevant, and how open science modalities can improve replicability.