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#12801

55

Dec. 22, 2023, 4:23 p.m.

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//chaotic rose anthology, december 22 "According to the scientists -- and we all know we can trust the scientists -- the winter solstice happened at 22:30 last night. But I know otherwise, from my personal truth, ..." "Can I get some head nods from maybe 30 or 40% of the class? ... Evan's making up for it [by nodding very intensely]. Good." "Was that your question? No? Doesn't matter. I'm going to ignore your question anyway." "I know that you don't know this, because I taught you everything you know." "'The inadequacy of language became an obstacle in my journey.' I know exactly what you mean, Frege." "If you love philosophy -- or if you hate philosophy -- well, that would include everyone ..." "No. Hands down. No more student contribution."

#1: shortly afterward, he led us on a chant to pray for the return of the sun, cf 9670, #7: cf 8385, only it wasn't even a half day

logic, rose

#12789

77

Dec. 21, 2023, 8:53 a.m.

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//chaotic rose anthology, december 20 "There are two ways we can go about this. When the teacher stops talking for a second, you can start talking about bullshit that's unrelated to class, or you can stop, and be quiet, and focus on what's happening in class." "Don't get mad at me, Katz! Or get mad at me, but suppress those feelings, as I often do." "I'm not going to look at the clock, because it would make me sad. ... There's no clock anyway? Great!" "Now, here's something new that will change your life. ... For the better. I have to clarify that every time." "I'm just retelling the story from october, but this time I'm using the word 'consistency' a lot." "He uses the pseudosphere, which is at my house, as part of the Christmas tree, so I don't have it with me now." "Perfect. And when I say 'perfect', I'm really crying inside. But it's only on the inside, so that's okay." "[Fus making an announcement is] the voice of nightmares." "Now we're getting to the part of this class where I make fun of Schwartz a lot." "[Schwartz is] so influenced by modern mathematics. He's like a caricature of the 21st-century mathematician." "If you ask whether something is true, Schwartz will say 'what do you mean, true? I don't care about truth! Just tell me the axioms, and give me my peanut butter sandwiches, and my water, and I'll sit in my hammock and derive the theorems.'"

#12752

1212

Dec. 18, 2023, 5:19 p.m.

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Rose: There we go. My first aleph of the year. Rose: They get progressively worse the more Judaism evaporates from my body.

#12734

66

Dec. 14, 2023, 5:43 p.m.

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//after explaining uncountability of the real numbers Rose: If you want to feel even more confused ... //introduces the Cantor ternary set (pathological fractal) Rose: The Cantor set is uncountable. Do you all believe me on that? Katz: I don't believe that. Rose: Okay, Katz. I can prove it to you. You have to consider the ternary representation of the real numbers ... *starts explaining binary and ternary* Katz: Okay, I believe you now. The Cantor set is uncountable. Rose: Will you just play along? *continues proof*

a real number in [0, 1] is in the Cantor set iff it has no 1s in the ternary expansion, so any number in it is an infinite sequence of 0s and 2s, which is equivalent to the set of all real numbers in [0, 1] in binary

logic, infinity, rose, katz

#12732

44

Dec. 14, 2023, 5:36 p.m.

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//chaotic rose anthology, december 14 "Maybe you're being way too precise, or maybe you're being just the appropriate amount of precise." "What are you saying? ... Wait. Let's watch a cute little video first." "Those of you who are learning this for the first time should be feeling nervous, as you realise that there are too many real numbers. There's just so freaking many of them!" "If you've spent between 0 and 20 hours staring at this poster, as you should ..." "On the fourth page, I got kinda lazy, so I did all the work myself."

#12712

1010

Dec. 12, 2023, 10:58 p.m.

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// working through a Fitch-style proof; ∀xƎy[P(y,x) -> ~Ǝz(P(y,z) ∧ P(z,y)] Rose: So let's take a guy. What should we name our guy? Student: Raul. Rose: Okay, Raul it is. So if someone loves Raul, then it's not the case that they have somebody they love who also loves them. // later Rose: So let's say Raul loves someone. I need a name for the person Raul loves. John: Paul. Rose: Paula. Okay. John: No, just Paul. Rose: Oh, straight Paul? Okay. Stephen: I'm not so sure if "straight" is the right word to use here.

#12697

88

Dec. 8, 2023, 4:15 p.m.

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Rose: Here we have a screenshot from Wikipedia. You know the presentation's getting serious when it includes a screenshot from Wikipedia.

https://en.wikipedia.org/wiki/Peano_arithmetic#Equivalent_axiomatizations

logic, wikipedia, rose

#12681

33

Dec. 6, 2023, 5:26 p.m.

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//explaining natural numbers to a hypothetical alien who can do Fitch-style proofs really well Rose: This is like if you try to teach a board game to a really smart person. Rose: You start explaining it, and very quickly they get annoyed, and say "stop trying to explain it! Just tell me all the rules."

#12680

88

Dec. 6, 2023, 5:24 p.m.

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Rose: What are you boys doing on a laptop? Alexei: Rose. ... We're watching your lectures. Rose: During my class? *closes Alexei's laptop* That's too much of me.

#12646

1010

Dec. 4, 2023, 4:03 p.m.

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//chaotic rose anthology, december 4 "It's been a long time since I've had a German-speaker in the class. We're about to get to a lot of German words. This is exciting." "I won't sign the fish forms for people not in the fish class [Marine Biology]." "Can we not play with the Tower of Hanoi? It makes a nonzero amount of sound." "Karen Cao is messing with me, and I appreciate that." "What's the Extreme Value Theorem? Katz raised his hand. Is he bluffing? Nobody knows." "The way they teach this [power series for trigonometric functions] in the US is pretty bad -- well, only if you think about it."