I haven't heard about Heard Bots myself, only the Depp Fakes. It's not an unreasonable question to ask for external corroboration when someone claims that something happened and their source is that they saw it.
Sadly, I am not invested enough to do research on this matter and uninterested in having an LLM convincingly tell me whatever it reads on the internet is the truth about this.
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The whole response is bizarre tbh. Talking about my "sudden" interest. I made one comment. "Deep in the chat". It's quite shallow. I am assuming this is a bot