There has been a longstanding mechanism of reporting.

A politician says something which is total bullshit or propaganda.

The newspaper never questions the bullshit.

Most readers believe the story and think it is true.

The closest we get to finding out the evidence - "We have evidence." Okay, that's okay then.

https://www.independent.co.uk/news/uk/politics/burnham-brexit-russian-interference-putin-eu-b3064955.html