Magnus/Hans the chess cheating scandal that never was.

Proving a negative is impossible in many situations. If I accuse you to have cheated at an exam, it is virtually impossible to prove retroactively that you did not cheat at said exam/competition. As most human beings have trouble with the notion of the impossibility of disproving a negative and will assume that where there is smoke there is fire, accusing someone without proof ESPECIALLY if you are in position of authority can damage this person reputation. And here is the vicious aspect of it. As you will NEVER be able to prove that you didn't cheat the only way you could put the matter at rest would in fact be to admit wrongly that you cheated just to put an end to the debate. 
Let's go back to the origin of the whole mess. 
 Magnus lose to Hans, resign from the tournament, and make a cryptic tweet that strongly suggest that Hans cheated. 
Hans was known to be an on-line cheater and his spectacular rise in ELO score was seen as suspicious by some in the chess world.  I guess that the aim of the maneuver was to focus the attention on Hans. Assuming that Hans was cheating, a careful examination of his past game, especially the one where he gained so much ELO would expose the cheating.
If that was the goal of Magnus, it works spectacularly well. Hans was the focus of attention at a level almost unprecedented in the chess world (when Elon musk tween about you and vibrating sex toy that's usually not going to be forgotten fast...)  His past game/behavior were analyzed to death at a level ranging from embarrassing (GM deciding that you need one game and stockfish to detect cheating) to highly professional. 

Results:  Despite what was probably the most extensive games data analysis in the history of chess, no evidence of OTB cheating past or present was put forward. 

Wrong mental association
- Past on-line cheating prove that Hans cheated OTB. No that's not related
- there is a huge and new cheating scandal in OTB chess, there is to currently no evidence/proof of that.

To this day if you can say that there is currently a big chess drama in the sense of all the media attention and that most of the discussion are revolving about cheating, there is no "chess cheating scandal " as no cheating on the OTB was uncover, either at the Sinquefield cup or in Hans past OTB games. 

This is a perfect illustration of why YOU NEVER TRY TO PROVE A NEGATIVE. As it is impossible to prove that no cheating took place in a game, if you start to think that cheating could have occurred and try to disprove it, you are never going to be able to stop looking if you cannot find proof of cheating.

Hence the whole perception that cheating is a HUGE issue in chess currently.

Concrete fact, we have relatively few instances on online cheating with no spectacular rise in the last few years and almost none instance of OTB. 

No trying to disprove a negative, I will look at chess cheating as a real issue only when we will have data telling us that it is a significant issue.