This link is not particularly relevant, as it talks about how the phrase "no evidence" is used within a specific community and that community has little overlap with the community which writes press releases after security incidents.
Security incident response teams do not have the same strange distinction between "real" evidence and the non-published non-peer-reviewed evidence which cannot be relied on or even really mentioned.
Security incident response teams do not have the same strange distinction between "real" evidence and the non-published non-peer-reviewed evidence which cannot be relied on or even really mentioned.