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Did you get this information from: "Undo or redo a tweet Discard your last tweet or re-edit it, quickly with shortcuts" or are you just guessing it based on th

• danpalmer 5y ago
  Neither, it's just fairly clear to me that this is not the sort of feature that a third party client to a service can typically implement if there is no support for it in the official client (completely separate from this being Twitter). As another example, Gmail has an "undo" button on sending an email, but other email clients don't (mostly). Why? Because email doesn't have the concept of un-doing a send, so the only way they can implement this at the "protocol level" is to... not, and to implement it entirely in the client with a delay.
• satvikpendem 5y ago
  It is well known that Twitter does not allow editing tweets. Any apps that ostensibly do that are simply delaying the tweet or deleting and reposting it.