In this particular case, the evidence would simply be the existence of the emails from scientists expressing their opinion, which are very different from public

In this particular case, the evidence would simply be the existence of the emails from scientists expressing their opinion, which are very different from public utterance. Strictly speaking, the article is about politicisation of scientists, rather than what really happened in Wuhan. But I take your point, the Telegraph is bilge. But then, so are all British broadsheets.