Ruing the day

Ever heard of Ruism? It's 儒家, the philosophical system of Kongzi, Mengzi, Xunzi... once known as Confucianism, the philosophical system of Confucius, Mencius and Hsun Tzu. I agreed to be part of a panel discussing two new books on Ruist ethics for the upcoming meeting of the American Academy of Religion, and I'm up to my neck in them, gasping for breath. I agreed when asked to participate because I would genuinely like to know more about Chinese ethics, but did not, of course, get around to looking at the books until recently. What am I going to say when I don't even know how to pronounce the names?!

Here's a line to ponder (Analects 6.25):

觚不觚、觚哉、觚哉 。
A gu [ritual vessel] that is not a gu—
is it really a gu? Is it really a gu?

One of the books to which I'm to respond spends many pages parsing this line, challenging alternative interpretations: it seems the reading of Ruism as concerned with the "rectification of names" hinges on lines like this one. What can I add to this as a no-Sinologist? At this point I'm babbling like a baby: gu? gu! gu....?!