I haven't personally verified this because I don't have Twitter, but "disputed" tweets are unable to be shared or retweeted. That should count as censorship.
But this is quibbling over words. Call it censorship, suppression, dissuasion, or whatever else you want. Twitter is trying to say "you should not believe this". At best, this is manipulation.
Like I said, imagine if China were in charge of this. Anything critical of China would be tagged as "you should not believe this"
Imagine if Nvidia was in charge of this, and tagged AMD's speed-tests with "you should not believe this".
Imagine if a candidate running for President had his or her tweets tagged with "you should not believe this". Think of how many people use Twitter and how that might influence how they vote? Oh wait, we don't have to imagine it, it's happening.
You have nothing to say on this subject, do you? You have nothing to say about the real potential for causing harm, swinging elections, and manipulating the populace. That's what I'm against, and why I'm against it. There's a potential for REAL HARM when you allow powerful interests to manipulate your thinking. Even if it's just a "this is disputed!"