Didn’t have time enough in Indianapolis to attend any of the sessions about threshold concepts, but I did hear about them in hallway and dinner conversations. I’d encountered the phrase before in this article, but at #4c14, it seemed like an awful lot was coming up threshold concepts, seemed like there’s a growing gusto for this sort of thing. Threshold concepts as their own sort of threshold. The oncoming threshold concept turn.
Home-ish now from the convention, tonight I was reading to Is. before bed, near the end of Harry Potter and the Sorcerer’s Stone, a book we’ve been chipping away at for, I don’t know, a month or more, every other bedtime. Harry and Hermione are advancing “Through the Trapdoor” (the 16th chapter’s title), in front of them a dead troll:
“I’m glad we didn’t have to fight that one,” Harry whispered as they stepped carefully over one of its massive legs. “Come on, I can’t breathe.”
He pulled open the next door, both of them hardly daring to look at what came next–but there was nothing very frightening in here, just a table with seven differently shaped bottles standing on it in a line.
“Snape’s,” said Harry. “What do we have to do?”
They stepped over the threshold, and immediately a fire sprang up behind them in the doorway. It wasn’t ordinary fire either; it was purple. At the same instant, black flames shot up in the doorway leading onward. They were trapped. (285)
Is. interrupted here to ask, “What’s a threshold?” And, attempting with a weak shrug to reach across connotations both referring to door trim and limits, I said, “It’s something like an edge, a boundary.”
That thresholds trap, enclose, bound, constrain, pen up, etc. and that they simultaneously, by doing so, protect, focus, and intensify a domain is at least part of their paradox. And I should be clear that I look forward to learning more about this idea emerging in service of disciplinary bona fides. But I’m also wondering where the idea (toward common disciplinary articulations) maps onto or butts up against rhetoric, which seems especially with invention and memory to by constituted by a kind of thresholding–if we can verb TC for a second–the re-articulations that themselves ignite and also extinguish flamewalls like the ones sandwiching poor Harry and Hermione in Rowling’s narrative telos.
Just wondering now which narrative telos “our” threshold concepts will flamewall in and flamewall out. Wondering how (im)permeable and how burning-hot the flamewalls will become and how much will char in their proximity.