pride is the source of shame
Well, he saw through that quickly. Half a silver is basically irrelevant compared to figuring out how to be loyal and non obviously Asmodean, so the question is how to keep the Gnome more interested in properly explaining. Well, it's a Gnome, so there is always the direct approach.
"Which way do I learn more? Some Gno- uh people don't want to explain the basics and just want to jump in the middle of their favorite parts and it's terrible missing the basics, but their enthusiasm for their favorite parts makes up for it. So yes, I could barely explain to you what Asmodeanism is compared to everything else, and maybe barely give a single example of something that is Lawful Neutral or Good, but I really don't know much besides that and I would like to learn in whatever order you feel like explaining. Particularly about non-evil forms of contracts and dealings and loans and price adjustment, but if that is too Abadaran for you, then just explain whatever parts of the non-evil alignments you feel like."
Abadarans generally want to charge way more than a silver or half a silver per hour, or even quarter hour, and Fernando's time isn't that valuable, so an hour of vaguely on topic Gnome rambling is still a good deal, all things considered.