At the time that I wrote that, we were knee deep in a discussion about the paradoxical way that the condition and Hiding was written, and didn't know how the Invisibility spell was written up. Based on the way RAW vs RAI has been discussed previously by WotC, as well as how they've been very specific about capitalization rules in this version, it was a very tortured, lawyerlike interpretation. I don't think we need that kind of language or structure, but the game has ceded so much ground to rules-lawyers and bad faith interpretations, it appears there's no going back.