It is pretty hard to have conclusive evidence both for and against in this case. The against camp seem to be looking at the real world for arguments more so then the for camp seem to look at the movies and EU.
My arguments as I recall them: several in-film references to droids' inability to think creatively by characters; the evidence of lack of free will in the numerous instances where droids have seemingly gone against their own desires (expressed personality is secondary to actual action, rather than being the cause as in sentient beings); that a droid's personality is not developed but present on activation before they have any ability to effect change themselves, therefore presumably is in accordance with the wishes of their creators; that we have never seen a droid develop in its personality, attitude or principles - something that self-aware creatures do almost as an inherent property of self-awareness.
None of those arguments, which are my principle arguments, are "looking at the real world" rather than the movie. I find it a little annoying when people make obviously wrong charges towards what another has said as an attempt to dismiss.
Well that made me feel bad about myself so I took the time to go through your posts and found that I had no reason to be. I found one(!) instance of humans taking about droids in a certain manner being used as proof/evidence of droids not being sentient/sapient while it was pretty clear to everyone that humans in the Star Wars world feel that way. It was this quote:
I remember in Ep IV where R2 sets off to find Obi Wan which is regarded as unusual with Luke's "I think he's trying to get back to his master" and Obi Wan's "I've never seen such dedication in a droid, before". When can a droid go against it's programming?
Sure you have some other points that sprung from the movies but they were like I said "interpretation" and nothing more, all other points were to ridicule the possibility of sapient droids by using toasters, Henry the vac and other appliances (including programming to let protocol droids swear (really?))
The main "real world" argument has resulted from yourself suggesting the creation of insults indicates sentience or creativity. The counter-argument is not about the real world just because it is valid in both the real world and in the setting. As I wrote in my original response it is more true in the setting than in the real world because the capabilities of Star Wars technology make factoring context into any insult generation even easier!
Actually I was asked to give examples of creativity and gave that as one of many examples and was then berated by someone who felt that swearing wasn't as creative as Leonardo Davinci and therefor my point was invalid, something I resented.
Swearing is a creative process as such and whether you can mimick it by programming is another case entirely, also I am hard pressed to come up with a reason why anyone (and in this case a 9 year old boy that is prone to yell "Yippie" instead of "F*ck") would create a protocol droid (Wookieepedia: a type of droid designed to assist sentients in their relations with one another and were programmed mostly for etiquette, and were often used as translators between sentients or between sentients and computers) that has the ability to insult others or feel the need to do so.
Edit: I would like to add that I in no way, shape or form am trying to be an assh#le and am not trying to insult, bait and or be rude to you. I have seen many posts here deteriorate into full blown arguments (some where I was involved) and no longer want any part of that.
Edited by DanteRotterdam