I don't think Nimoy in 1991 had enough a grip on the Spock character to know whether or not the character would be capable of doing that mind-meld as far as ethics are concerned.
Nobody would have that sort of grip, until somebody went and gripped...
The character evolved throughout the movies (and had already evolved during the original show), and was now "hypothetically" telling his superiors to go to hell, using human religious metaphors and wit, insisting that logic was not the end-all of being Vulcan, and leaving Starfleet to talk peace with Klingons. What the movie showed us was the most recent version of Spock - as such neither unrealistic nor realistic, as we couldn't objectively "grip" how the character would evolve. And
that is realism,
as Spock always was a torn character, prone to mental upheavals that would leave
us gasping or rolling our eyes.
If to me she said Nanclaus then she said it.
And that's an objective truth, really. It is an oft-confirmed fact that people can and will get different interpretations out of poor signal, and that usually nothing can be done to decide between which is the correct interpretation because the human tendency to hear things goes way beyond the information content of the signal.
That is, no machine could ever do better than humans, unless one counts it as
"better" when the machine correctly states that there is not enough
information content in the signal to get any sort of an interpretation out.
My copies of ST6 all have shitty soundtracks, and none is the "flashes of
villain faces" version, so I can't help much in terms of offering another
subjective truth. But "And others" and "Nanclus" both sound like perfectly
valid interpretations, and the latter basically has become the de facto truth
now that every third novel out there is calling that Ambassador by that
name.
Timo Saloniemi