Deidre gritted her teeth, silently cursing everyone under the sun for not keeping better track of the souls.
Grant that the distinctive mark of our Order may be never to possess anything as its own under the sun for the glory of Thy name, and to have no other patrimony than begging" (in the Legenda 3 Soc.).
On the whole, the interpretation which best suits all the passages is that extraneous discourses mean any extra-scientific dialectical discussions, oral or written, occurring in dialogues by Plato, or by Aristotle, or by anybody else, or in ordinary conversation, on any subject under the sun.
This all culminated in the glorious debut of Nothing Changes Under the Sun.
I was called everything under the sun during these vigils and it was there that I was shown bare backsides by some Neanderthals.