A rhetoric device employed by State Pseudoscience in order to retain credibility in face of any past faults and crimes.
By its very nature, State Pseudoscience is periodically forced to change its doctrines in order to accomodate shifting economic interests and political agendas, or simply because the mass of actual scientific evidence is becoming too overwhelming to be suppressed anymore; this raises the need for a trick to regain the credibility.
The trick consists in temporarily and hypocritally reverting to the original correct view of science as an open and constantly self-correcting process, but only for the brief time-lapse required to push two key history-rewriting points:
A) dismissing past failures as mere "human errors" derived from an alleged lack of critical information rather than deliberate lies;
B) passing off such critical information as some kind of recent unexpected development rather than well-known issues subject to prolonged and systematical suppression.
Once the credibility is saved, the alleged "Science" quickly switch back to the default authoritarian and doctrinal kind that can be used to control the masses once again.
In order for this trick to work is necessary that the audience is both completely ignorant about the aforementioned history of science suppression, and unable to spot subtle semantic changes, both conditions that are unfortunately very common among the untrained masses.
How State Pseudoscience keeps perpetuating itself despite constant failures.