Memes

They're usually at the bottom of the Wikipedia article.

For what exactly? It's things that even communists in the Czechia do not deny, it's like general knowledge here. For example for the work camps in Jáchymov where prisoners were forced to mine uranium, I was there year ago. I saw what remains from the camps. There was a museum with some photos, list of people who died there and which ones were political prisoners. There was letters that prisoners were smuggling from the camp to inform their families that they are alive. There were also video interviews with people who survived it. What I find the most convincing is the testimony of people who lived in communism in Czechoslovakia. Many people who survived the work camps are still alive and there is a project called "Memory of the nation". In this project, people are interviewing the old people who lived in communism. I personally done it once, I interviewed mr. Brožek. There are over 16000 people who were interviewed and when you listen to it, when you see the old people talking about the monstrosities they experienced or when you even do the interview, it's really convincing. I do not believe that these people all made it up or that somebody told them to say that. As I said, there's nobody denying it. And in Czechoslovakia there were basically no communists arrested or punished after the revolution, so I belive that if it was made up, somebody would say it's made up. Also you can't pay that many people to lie. I'm pretty sure that in 20 years when all these people will be dead, people will start to deny it, but now when all these people are alive and lots of them had family members or friends executed, falsely sentenced or persecuted in other ways, nobody will say it's not true. Also strangely, communist party was never banned, even after revolution, but in the most recent elections in 2021, they had 3,6% of the votes. That also proves that nobody wants communism in Czechia after 40 years of their dictatorship. Here is the link for the Memory of the nation project, it's in czech, but you can use the translate page feature and most of the interviews are also avaivable in text form, so you should be able to translate them: https://www.pametnaroda.cz/cs/archive

EDIT: Also, I was in the archive in Prague where lots of documents are stored, mostly StB folder of people they were were watching for various reasons. There are tons of material and I don't think anybody would want to fake it, it would be lot of work for no real reason.