To illustrate a point you can relate an anecdote (it happened to me) or quote from a source (it happened to others, elsewhere, possibly in a book)—that’s called using testimony as a form of argument. But what if you need something tailor-made for the occasion of your argument? Well, then you fire-up your imagination and your Singer model 2.E (E for English) and fabricate your own testimony.
Yes, you call upon a fictional person, or indeed, you personify whomever you need—that’s the rhetorical figure of prosopopoeia.
As I hinted in my previous post on Tolkien’s fox, prosopopoeia isn’t limited to fictional characters, on the contrary, it can come to your aid in everyday conversation (If he were here he’d tell you [insert convenient pseudo-quote]), and even more so in carefully-crafted arguments.
Before he became the celebrated author behind the modern Lord of the Rings franchise, John Ronald Reuel Tolkien (1892–1973) was a philologist with a penchant for developing imaginary languages. Indeed, he says in his 1951 letter to Milton Waldman how “I have been at it since I could write” and how “behind my stories is now a nexus of languages”. That storytelling, nay, world-building can spring from such a low-level linguistic basis—language first, world later—fascinates me.
But perhaps it shouldn’t: in a lot of ways it’s one of the most logical places to start if you want a complex world which is self-consistent and complete. Because, ultimately, world-building is about cohesion on a grand scale.