anonymous on Nostr: I was pointing out the same thing. You can only prove that the content-carrier (event ...

I was pointing out the same thing. You can only prove that the content-carrier (event in nostr) originates from the owner of the keypair, and even then we assume it is only owned by one person.

quoting
nevent1q…36w3

Of the post yes, but even then ypu cannot claim the message itself is authentic.