Criteria for scientific authorship still lack of universal consensus among scientists, thus rising speculations that, sometimes, only justify the unjustifiable. In this text, my focus is the empirical science and I propose that participation in data collection (DC) or provision of material resources (MR) for the research are neither sufficient, nor necessary, conditions to warrant authorship in
... [Show full abstract] scientific texts. After presenting the main theoretical bases of my argument, I show some data supporting that such participations (DC and/or MR) have been largely used for assignment of scientific authorship in the international literature, thus making this debate more relevant. Finally, I propose separate the participation in a scientific study in three classes: authorship, collaboration and acknowledgements, thus valorizing each of these participations, but not contradicting its peculiarities in the process of building scientific knowledge.