For instance if you believe socialism is viable and all the spending is a good thing and doesn't result in inflation, when inflation does set in and even correlate as the data clearly shows the socialist will find ANY REASON to choose any bit of data and twist it to align with the confirmed perception. Such as when the readers of Trump's speech thought it was Obama's. Even though it obviously conflicted with much of what they held true, the rationalized it away in a manner that allowed them to think it actually confirmed their opinion of Obama and their best interests.
They'll even claim printing money decreases inflation. And I've even heard them buy that load of crap when Biden and Kamala and that press secretary made the statement. Incredible. Yet inflation staring them in the face and they deny there is any correlation. There brain just will not allow them to destroy the perception. There entire psyche has already invested so much effort... 10 years of effort developing the tool it uses to make sense of the world.