Despite popular belief, an alternative fact is not a lie, but a fact derived in an alternate reality or parallel universe. These facts are often hard to verify as all data and analysis doesn't leave the alternate reality or universe where it was derived. Furthermore most people are not able to access the alternate reality or universe, as it requires special abilities reserved for those with a wonton disregard for logic, and zero cognitive dissonance.
Trump: Hey Pence, Nickelback is the best selling band of all time! We need to book them for the inauguration.
Pence: Save your alternate facts for the media and twitter.
Attempting to explain something that isn’t true using made up “alternative facts” like Kellyanne Conway.
President Trump told us he was researching using bleach in the human body to kill Coronavirus. The next day he gave some bullshit alternative factsplanation that he “was being sarcastic.”