Minor physics nitpick in the article "...and a gradually widening conductor lets the inductance increase proportionally with key travel instead of jumping abruptly as the metal traverses the field. As the key is pressed, more of the cone moves into the field produced by the coil, inducing eddy currents in the metal. Following Lenz’s law, those currents oppose the original field, which increases the coil’s effective inductance..."

L, the inductance, is reduced, not increased due to insertion of a conductor, unless the conductor is ferromagnetic. A non-ferromagnetic conductor will expel flux due to generated eddy currents, lowering flux-linkage, therefore L, assuming driving coil current is held at a steady rms magnitude.

Cat, n.

    A soft, indestructible automaton provided by nature to be kicked when things go wrong in the domestic circle.

???

Chelicerates are an ancient lineage represented best (or, famously) by spiders: chelicerae meaning pincers/fangs.

B/c http instead https, perhaps a deliberate choice.

Thanks. I posted with the aim to highlight by contrast: progress relative to a snapshot from the 00's.

Setup: Experimenting with video summaries/transcription using Gemini. Last reply had to be manually stopped, as it went into an apparently infinite loop of generating the same textual matter. Perhaps the stochastic prediction of the next word coincided with the first word of the text's repeating 'unit cell', so to speak, leading to recursion.

Unyielding fidelity to the original article title.

Faithful "to a t"

Bang on.. Several thought experiments and constructs he would present in the lectures will elucidate/challenge a foundational concept in such a manner as to lead an inquisitive reader or student on a quest to absorb the extant knowledge just to be able to answer the conundrum satisfactorily. Many of these have since become classics.

Yes, another thing Feynman is doing is teaching people how to think about and model problems in a simple but reliable way in their mind, something he was very good at. In a sense his specific subject matter is just an example to demonstrate the process.

A textbook that just plainly presents the facts about a specific phenomenon isn't necessarily training you to think like a theorist, in the way Feynman is.