jfarmer

15 ms·

91.
by jfarmer 7y ago
"strictly subsets of the reals", thanks autocorrect. For example, if ℚ is the rationals and ℝ is the reals then ℚ∪{√2} is a strict superset of the rationals but a strict subset of the reals. However, it still has the same cardinal
92.
by jfarmer 7y ago
Whether a set of cardinality strictly between the rationals and reals exists is independent of ZFC. https://en.m.wikipedia.org/wiki/Continuum_hypothesis There are many sets which are strict supersets of the rationals a
93.
by jfarmer 7y ago
Arrow-Debreu isn't all it's cracked up to be: http://frankackerman.com/publications/economictheory/Interpr...
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by jfarmer 7y ago
I'd say the author is helping students develop their capacity for abductive reasoning ( https://en.wikipedia.org/wiki/Abductive_reasoning ). The goal is to get students to build accurate models for what the computer
95.
by jfarmer 7y ago
This is really interesting. Any links to relevant research? I'd love to read up.
96.
by jfarmer 7y ago
I co-founded Dev Bootcamp where I was responsible for training our teachers and designing our curriculum. I 1000% endorse the article. The author isn't suggesting students will "magically figure it out". He's helping the
97.
by jfarmer 7y ago
Nope, I just typed the above off-the-cuff. I could tweet storm it. Would that be useful?
98.
by jfarmer 7y ago
A relevant Twitter thread: https://twitter.com/NeuroStats/status/1192679554306887681 At the risk of projecting, this has the hallmark of bad experimental design. The best experiments are designed to determine whic
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by jfarmer 7y ago
Just because the medium is the same doesn't mean the customer wants the same types of recommendations in two different contexts.
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by jfarmer 7y ago
This is a great comment. People too often think of interview questions as purely factual, existing outside the process itself, but the reality is that the questions (once asked) have a psychological impact that influences what comes next.
101.
by jfarmer 7y ago
I took `oneshot908 as saying that the Google+ team had a broadly isolationist attitude. Their distance from both co-workers / potential internal contributors and customers/users was a reflection of this and that trickled down into
102.
by jfarmer 7y ago
While you’re right, the original post is meant to be pedagogical. Someone who doesn’t understand the fundamentals of model selection might learn the wrong lesson(s). You kinda have to expect a student to use the examples you give. There’s r
103.
by jfarmer 7y ago
The axiom of infinity ("there exists an infinite set") is what gives you permission to carry out the construction you describe. The usual construction of the naturals via set theory has us define... 1. 0 as the empty set ∅ 2. succ
104.
by jfarmer 7y ago
I can't vouch for other bootcamps! DBC was sold in 2015 to Kaplan and they shut it down in 2017. :( Here's a thread I posted the other day, though, that might be interesting to you: https://twitter.com/jfarmer&#x2
105.
by jfarmer 7y ago
I can’t vouch for other programs, but I co-founded Dev Bootcamp (the first programming bootcamp) and the sequence you outlined is almost verbatim how we brought students into Rails. We’d explain it the way you described. We’d have them sta
106.
by jfarmer 7y ago
It's important to separate the structure from the objects. There's 2-the-natural-number, 2-the-integer, 2-the-rational, and 2-the-real. In each context, it's the "same" 2, but the structure we put around it is diff
107.
by jfarmer 7y ago
The research says structured interviews and work-sample tests have similar predictive power and all together they have yet more. The takeaway shouldn’t be IQ über alles.
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by jfarmer 8y ago
I've been involved in coding education for about 7 years and this is the approach I've always taken. It works! At https://www.missionbit.com/ I taught a web development class for a while and we'd start with
109.
by jfarmer 8y ago
Also true. I think I did Q(phi) originally because Binet’s formula is less obvious under that basis.
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by jfarmer 8y ago
Of course. And if a student realizes that — or it's pointed out constructively — a lightbulb might go off! The (pedagogical) advantages of ℚ(φ) are that it seems like less of a trick to the student and Binet's formula is more app
111.
by jfarmer 8y ago
It's possible to use Binet's formula, too, if you implement the exact arithmetic of ℚ(φ). φ is the golden ratio and ℚ(φ) is the set of all numbers of the form a + bφ where a,b are rational numbers. So if you create a class like Ph
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by jfarmer 8y ago
Watch/ask some kids about how they play Fortnite! I’ve seen them just hanging around chatting and dancing (especially younger kids).
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by jfarmer 8y ago
Hey hey! I run workshops for engineers who want to develop leadership skills. Shoot me an email at jesse@20bits.com if you want to chat. Honestly, it's up to you. There is no "right" answer here, although there might be a
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by jfarmer 8y ago
Dilution effect: https://psychology.iresearchnet.com/social-psychology/social...
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by jfarmer 8y ago
Haha, well, hopefully nobody's opening with "Where do you see yourself in 5 years?" or any of the questions I listed! Doing either of those things is a great way to signal to the candidate that INTERVIEW MODE has been enga
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by jfarmer 8y ago
Disclaimer: I work at Strive where we run management workshops, including ones around evidence-based interviewing. If you're interested in learning more, reach out to me at jesse@strive.co! An evidence-based approach (aka the scientif
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by jfarmer 8y ago
Why 5 years? Why not 1? Why not 10? 2? 4? How might those numbers change the answers you receive? Are you even testing to see how people's responses change as a function of that number? Are you even coding the responses in a way t
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by jfarmer 8y ago
The research says work-sample tests and structured interviews are the way to go and they're well within reach for a startup. In fact, they're easier for a startup in many ways: half the difficulty in implementing a structured pro
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by jfarmer 8y ago
All the research into interviewing and cognitive biases says that asking questions for "color" reduces interviewer's ability to predict outcomes while simultaneously increasing their confidence that they've gleaned infor
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by jfarmer 8y ago
I second this. The notation was driven by the concepts, problems, and approaches. If the notation feels bizarre it’s because you don’t see how it improves/clarifies the underlying concepts, problems, and approaches. Learning the nota

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