My suspicion is that professors of organic chemistry who teach at the undergraduate level fall into a couple of different camps. Those that require very strict adherence to formal IUPAC rules all the time, and perhaps those who are prepared to be a little more lenient as long as there is no ambiguity. How accurate (or otherwise) is that thought? There seems to me to be all kinds of inconsistencies in various texts which suggest that a lack of ambiguity is they key for many, rather than a strict, hardline IUPAC stance. I’d love to hear your thoughts on that.