If you make up s#it in order to gain some benefit (like a grant, promotion, speaking fees, etc) that makes you a dishonest scumbag. But if you then sue someone for calling you a dishonest scumbag knowing that the evidence doesn’t exist to prove them wrong, that makes you a very dumb dishonest scumbag.
If you make up s#it and gain some benefit (like a grant, promotion, speaking fees, etc) you are legally a fraud and deserve whatever justice the Courts meet out.
If you are a scientist and do it you have also engaged in scientific fraud, for which you deserve the condemnation of all educated men everywhere. You name should go in the history books for perpetrating yet another hoax on humanity.