What does alternative facts mean?
Alternative facts have been called many things: falsehoods, untruths, delusions. A fact is something that actually exists—what we would call “reality” or “truth.” An alternative is one of the choices in a set of given options; typically the options are opposites of each other. So to talk about alternative facts is to talk about the opposite of reality (which is delusion), or the opposite of truth (which is untruth).
John 8:42-45 Jesus said unto them, If God were your Father, ye would love me: for I proceeded forth and came from God; neither came I of myself, but he sent me. Why do ye not understand my speech? even because ye cannot hear my word. Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it. And because I tell you the truth, ye believe me not.
Rev 21:8 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.