437: Mouse Relay Intercept

Dear Hank & John

Complexly

Social Media, Hank Green, Self-improvement, Humor, Heartfelt, Conversations, Relationships, Youtube, Itunes:https://feeds.simplecast.com/9yni3wal, Society & Culture, Life, John Green, Pop Culture, Vlogbrothers, Comedy, Brothers, Dear Hank And John, Authors, Green Brothers, Soccer, People, Improv, 770430, Advice, Mars, Space, Education, Philosophy

4.9 • 8K Ratings

🗓️ 14 January 2026

⏱️ 39 minutes

🔗️ Recording | iTunes | RSS

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Summary

What would you want your clickbait title to be? What is a face? Why is an MRI so loud? Could Rome actually be built in a day? What is going on with the design of traffic lights? …Hank and John Green have answers!

If you're in need of dubious advice, email us at [email protected].

Join us for monthly livestreams at patreon.com/dearhankandjohn.

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Transcript

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0:00.0	You're listening to a Complexly podcast.
0:09.2	Hello and welcome to Dear Hank and John.
0:12.1	Or is I prefer to think of it, dear John and Hank.
0:14.1	It's a podcast where two brothers answer your questions, give you to B's advice,
0:17.9	and bring you all the week's news from both Mars and AFC Wimbledon.
0:21.1	John, why is your foot never 12 inches?
0:25.7	Um, why? Because 12 inches is infinitely precise. It's a rigidly defined length, while a human
0:31.9	foot is a soft to deformable biological object with no uniquely defined endpoints.
0:36.7	There's no canonical measurement
0:38.1	vertical, and it is a length that varies with posture, load, temperature, time of day,
0:42.5	and measurement error. Any real measurement has uncertainty. The boundary of the foot is fuzzy at
0:47.4	the atomic scale, and for a continuously varying quantity, the probability of matching one
0:52.5	exact value is zero. So a foot can be measured or described
0:56.5	as 12 inches long, but in the mathematical and metrological sense, it can never be exactly
1:01.4	12 inches long. Did you ask Chat ChpT for a dad joke? No, no, that was me. Okay.
1:15.5	I went to Reddit looking for a dad joke and there was one.
1:18.9	It was why is a hand never 12 inches long because then that would be a foot.
1:23.1	And then I thought to myself, well, what if a foot was exactly 12 inches long?
1:24.5	Actually, that would be impossible.
1:25.1	Okay.
1:26.5	And then I wrote that.
1:27.0	Okay.
	...

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