Do you ever fact-check speakers you see on TV or the internet (or in real life)?

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A well-known political figure in the US recently said (in a speech, I think) that "affordability"was a "made-up word" that did not exist in the English language until Liberals made it up over the past few years. That statement did not seem right to me. I could remember "affordability" being used in conversations about the economy for decades. I decided to do my own "due diligence (research). I found that "affordability" is in both the Oxford English Dictionary and the Miriam-Webster Dictionary. It dates back to at least 1910, when it can be found in printed literature. The word "affordable" has Old English roots and dates back to at least the 17th Century. . So the speaker was wrong. But does that mean he was lying? I have known people who cling dearly "facts":that are dead wrong. The tend to be resistant to being corrected. Do you know people who often "spout" things that are simply incorrect/ How you dead with it? Do you think of them as liars? Or just individuals who are poorly informed?