Authorial intent in Star Wars - does it matter or not?
I'll briefly write my opinion on this.
Once an author publishes his/her work and that is accepted into the continuity by the story group/whoever is in charge of such things, it becomes canon.
Canon is the keyword here. Because when discussing Star Wars canon, only things that are part of it, should be treated as fact. This is literally so obvious, that it should not need stating. And yet it does, because whatever notes an author has made on his/her work after the publishing, are not canon, unless accepted into the continuity by the story group, is not canon.
And yet people still use them freely in debates concerning the Star Wars canon, despite not being part of it. A common defence (the only defence that I've heard so far) is that the author made the work, therefore his/her opinion over it is official.
But in reality, the only thing that's official here is what's approved by the story group. And the author's opinion on their own work is not (except in the case of Lucas but he's an exception to the rule). Honestly, I might as well accept fanfics as well, and make up some random excuse to back it up.
Yeah, an excuse. Because that's all it is. The rules of canon are clear. Authors have absolutely zero power over it; their words cannot bend its rules. Authorial intent is an excuse to further one's agenda, and that's it.
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My opinion of course, you are free to have your own. Let's discuss this in a civil manner.