In 2014, the European Commission initiated a process to strengthen science 2.0 as a core research policy concept. However, this turned into a substantial ideational shift. The concept of science 2.0 was dropped. Instead, open science became established as one of the three pillars of the €94 billion research framework programme Horizon Europe. This article scrutinises the official narrative regarding the shift of concepts, identifying transparency issues, specifically misrepresentation of concepts and data, and the redaction of key material. This can be characterised as problems of input legitimacy. A public consultation did take place, but numerous transparency issues can be found. From science 2.0 to open science, the ideational shift was portrayed as simply a matter of exchanging two synonymous concepts. However, science 2.0 is a descriptive concept referring to science being transformed by digitalisation. In contrast, open science involves normative assumptions about how science should work and be governed.