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Hazard@natural_hazard• over 5 years ago

tweet storm to get unstuck on a blog post on formal logic

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

depending on your teacher, odds are you're going to spend a lot of time in a FL class working on some bullshit logic on the object level is the most tedious innane nonsense. logic on the meta level just barely starts to get interesting

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

programming languages are formal systems you can think of formal logic as a very specific, shitty programming language

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

good angle: you can have higher and lower level programming languages that all have the same "expressive power" (all turing complete (sorta)) it's harder to code in brainfuck than in python but brainfuck has a simpler compiler than python

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

Formal logic is a pl, where a string being properly compiled means that it is a correct mathematical proof it's also a pl where people have tried to make the compiler as small and simple as possible, so that it's easier for humans to analyze it and go "seems legit"

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

this means that *doing* anything in completely formal logic is an absolute nightmare with a hilbert system it takes like 9 steps to prove A implies A what you gain is ease of proving things about the hilbert system

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

one teacher made this quite clear, and ensured that we spent as little time as possible having to make completely formal proofs (because they only exist at that level of formality so machines can do them) but I've had a whole logic class that was nothing but doing deductions :(

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

making people do formal deductions is like making people compile code by hand maybe do it once, just so they can go "thanks GOD computers exist" but DON'T MAKE THEM DO IT FOR A WHOLE SEMESTER!!!"

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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

https://t.co/ZB2DjCx1Tx

Tweet image 1
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3/27/2020
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Hazard@natural_hazard• over 5 years ago
Replying to @natural_hazard

okay, that's my biggest gripe. onto cooler stuff someone's gotta learn logic good, so we can do dope stuff like make theorem provers, and like, have programming languages at all

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3/27/2020