The gaslighting of America continues.
These absurd, self-incriminating, and contradictory statements aren't Giuliani making the same mistake over and over again. Imbuing the target audience with an expectation of deception and creating an environment of confusion is a central facet of authoritarian propaganda.
Hannah Arendt identified the same thing in the nazi movement almost 70 years ago in her book, The Origins of Totalitarianism:
“In an ever-changing, incomprehensible world the masses had reached the point where they would, at the same time, believe everything and nothing, think that everything was possible and that nothing was true. ... Mass propaganda discovered that its audience was ready at all times to believe the worst, no matter how absurd, and did not particularly object to being deceived because it held every statement to be a lie anyhow. The totalitarian mass leaders based their propaganda on the correct psychological assumption that, under such conditions, one could make people believe the most fantastic statements one day, and trust that if the next day they were given irrefutable proof of their falsehood, they would take refuge in cynicism; instead of deserting the leaders who had lied to them, they would protest that they had known all along that the statement was a lie and would admire the leaders for their superior tactical cleverness.”
That's why right-wing media and leadership go to such efforts to project corruption and deception onto Democrats and the institutional press. They need an environment where there's no expectation of virtue by any actors so they suffer no disadvantage for their obvious lies and criminal behavior.
"The biased liberal mainstream media" is repeated dozens of times everyday no matter what conservative source you're consuming. It's so central to right-wing messaging and it's no different than the gaslighting Giuliani, Trump, or Putin engage in; it's all a strategy to create an environment where truth and virtue are negated.