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File: informallogic.png (245 KB, 453x714)
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Is this a good book to start studying informal logic? What exactly should I expect?
>>
>>24942641
This title is baffling. "Formal logic" doesn't mean "specific" logic. It's called "formal" because it deals strictly with the form of arguments, not their content. The distinction is between form and matter, not formal and informal. Material logic is its own thing (oft ignored because of the infamies of the Ockhamites).

But to answer your question, get Socratic Logic by Peter Kreeft.
>>
>>24942641
There is no reason to limit yourself to informal logic. Many good introductory logic books and critical thinking books cover both informal and formal logic, and you need to know both.

>>24943235
Seconding this book.

https://archive.org/details/peter-kreeft-socratic-logic

Nov 14, 2023https://youtu.be/-CUcYOT2Bzc
Nov 24, 2023https://youtu.be/_0-EM6hr4Ic
Dec 6, 2023https://youtu.be/fREgfDIlSPc
Dec 29, 2023https://youtu.be/Ug4IdNt0mfk
Feb 19, 2024https://youtu.be/lvB7J8gphSw
Feb 23, 2024https://youtu.be/MJy7a7_H83g
Apr 2, 2024https://youtu.be/KCag3jyc1o8
Apr 29, 2024https://youtu.be/bmeOyIMDvXk
Jul 3, 2024https://youtu.be/--ZcD6Odm-4
Jul 4, 2024https://youtu.be/ajEXwvfriE8
Jul 26, 2024https://youtu.be/vVYconX8lzQ
Sep 15, 2024https://youtu.be/SAqSxwY4cec
June 26, 2025https://youtu.be/Z3k7eLRiwOI
Sep 26, 2025https://youtu.be/EINouOeV0Ak

These are good too:

https://annas-archive.org/md5/c26f685fb955fab4b6a579e122cd19ad

Good primer, short book
https://annas-archive.org/md5/c1c4a972753ce86d1d82c2c3ef189af9
Extended version with exercises
https://annas-archive.org/md5/4e88b733bdbdcb097172bb427db5bca6

https://annas-archive.org/md5/7dd390a7784e5e7507669ea271466ff7

https://open.umn.edu/opentextbooks/textbooks/introduction-to-logic-and-critical-thinking

https://annas-archive.org/md5/5af2e8e2eb3a07c46df10b2de453775c

https://annas-archive.org/md5/5885cebb239fbd36f6c370d49c44018b

https://annas-archive.org/md5/ff708dec36284c381333681bfbce4d1e

https://archive.org/details/logicorrightuseo00watt
https://archive.org/details/logick_2507_librivox
table of contents: https://www.heritagebooks.org/content/Logicsample.pdf
>>
>>24943510
Based logic anon. Doing good anon. Are you the same anon who talks about the Prussian school system?
>>
>>24943541
Yes, that's me.

https://archive.4plebs.org/pol/thread/512205412/#512207515
>>
>>24942641
I had a look at it and it includes a little formal logic too. It looks like a good book. That book plus this would probably be a good combo:

forallx.openlogicproject.org

This lecture series is also good although the audio intentionally gets progressively worse to make you want to buy the mp3 download, but the first few videos should have ok audio.

https://m.youtube.com/playlist?list=PLqsoWxJ-qmMtr7i6D_yvSpPC-hTOzdWas
>>
Also study Euclid's Elements, it develops logical thinking, that's why they stopped teaching it, the Prussian education system is all about suppressing logic/critical thinking/the trivium for the bottom 99.5% of the population while teaching it to the top 0.5%.

https://elements.ratherthanpaper.com/1.1
https://youtu.be/XLlThlqCFeg

https://elements.ratherthanpaper.com/1.2
https://youtu.be/UHZO2dviZfU

https://elements.ratherthanpaper.com/1.3
https://youtu.be/_ZwcobIExto

https://www.desmos.com/geometry

https://www.latimes.com/archives/la-xpm-2006-jan-30-oe-crease30-story.html
>>
>>24943776
>>
You also need to learn grammar. Grammar, logic and rhetoric are interconnected, these are the Trivium, that's the real critical thinking. Study Latin to get an understanding of grammar, and read the Trivium book by Miriam Joseph I posted earlier.

Familia Romana
https://archive.org/details/familia-romana

audio
https://archive.org/details/familia-romana-and-colloquia-personarum-audio-files
>>>/t/1344565

exercitia latina
https://dn721508.ca.archive.org/0/items/lingua-latina-per-se-illustrata_202506/Lingua%20Lat%C4%ABna%20per%20s%C4%93%20ill%C5%ABstr%C4%81ta/Pars%20I/Exercitia%20Lat%C4%ABna%20I.pdf

colloquia personarum
https://dn721508.ca.archive.org/0/items/lingua-latina-per-se-illustrata_202506/Lingua%20Lat%C4%ABna%20per%20s%C4%93%20ill%C5%ABstr%C4%81ta/Pars%20I/Suppl%C4%93menta/%C3%98rberg%2C%20Colloquia%20pers%C5%8Dn%C4%81rum.pdf

neumann companion
https://leftychan.net/edu/src/1608528074592-0.pdf

answer key
https://dn721508.ca.archive.org/0/items/lingua-latina-per-se-illustrata_202506/Lingua%20Lat%C4%ABna%20per%20s%C4%93%20ill%C5%ABstr%C4%81ta/Teacher%27s%20Materials.pdf

01https://files.catbox.moe/zj3yws.mp4
02https://files.catbox.moe/3t7sc3.mp4
03https://files.catbox.moe/1cjlwe.mp4
04https://files.catbox.moe/5ljwg8.mp4
05https://files.catbox.moe/etzxkw.mp4
06https://files.catbox.moe/0kh9gs.mp4
07https://files.catbox.moe/1hntqg.mp4
08https://files.catbox.moe/559z4u.mp4
09https://files.catbox.moe/heuw4i.mp4
10https://files.catbox.moe/n9gpgw.mp4
11https://files.catbox.moe/zvf2dc.mp4
12https://files.catbox.moe/a0art4.mp4
13https://files.catbox.moe/n580tf.mp4
14https://files.catbox.moe/h2eikt.mp4
15https://files.catbox.moe/rqbjv6.mp4
16https://files.catbox.moe/wi5xus.mp4
17https://files.catbox.moe/ht9noe.mp4
18https://files.catbox.moe/9ospv5.mp4
19https://files.catbox.moe/9o2h9f.mp4
20https://files.catbox.moe/r1bafj.mp4
21https://files.catbox.moe/x6y9sd.mp4
22https://files.catbox.moe/65vrqi.mp4
23https://files.catbox.moe/2tybr2.mp4
24https://files.catbox.moe/5nlup0.mp4
25https://files.catbox.moe/kwehqn.mp4
26https://files.catbox.moe/7rim8t.mp4
27https://files.catbox.moe/464bxv.mp4
28https://files.catbox.moe/f2k98o.mp4
29https://files.catbox.moe/kfoafs.mp4
30https://files.catbox.moe/xmf1qc.mp4
31https://files.catbox.moe/2svzr7.mp4

https://m.youtube.com/playlist?list=PLNnqqvK2yDEFVdM_5wV4Od8kV2GaSo7jz

https://youtu.be/AOcy6RHw7A8

https://en.wikipedia.org/wiki/Trivial_school

These are also good:

Principles of general grammar. Comp. and arranged for the use of colleges and schools by Roemer, Jean
https://archive.org/details/principlesgener00roemgoog

Principles of general grammar : adapted to the capacity of youth, and proper to serve as an introduction to the study of languages by Silvestre de Sacy, A. I. (Antoine Isaac)
https://archive.org/details/principlesgener00sacygoog
>>
lewis carroll symbolic logic is nice
>>
This guy has a lot of stuff on his youtube channel and website.

https://youtu.be/HBueOsRp9Ls
>>
File: 1750426661770124.jpg (702 KB, 2550x3300)
702 KB
702 KB JPG
One good way to learn and practice logic is to download LSAT tests and do questions on the logical reasoning section, and then google explanations and discussions of the questions.

https://img.cracklsat.net/lsat/pt/pt1.pdf
...
https://img.cracklsat.net/lsat/pt/pt90.pdf

Picrel is what those questions look like. Change the url above and you have 90 such tests online for free download. Just google "lsat preptest 1 explanations" and similar or part of the text of a question, there are multiple sites which have explanations and discussions of the questions.

There are also a lot of books, youtube videos and other materials.

https://annas-archive.org/md5/ff708dec36284c381333681bfbce4d1e

https://www.youtube.com/playlist?list=PLeamyERJVQLDHH0zijOOpqULKD6yU2Uxe

I've mostly done the logical reasoning section, but from what I've heard the reading comprehension section is good too and is also about logic and critical thinking.
>>
>>24943549
Good to find you. Got something on Math and Physics?
>>
Lol, triviumfag is up to his bullshitting again
>>
>>24943235
How is this one?
>>
>>24942641
I was assigned intro to logic by irving copi, I supplemented that with more advanced formal logic books, and that was it. Try to practice the books, and apply it to philosophy. Study empirical methods of proving things too, along with statistics and you're fully developed.
>>
>>24944184

>>24943776

>>24943779

https://archive.4plebs.org/pol/thread/522481839

https://www.youtube.com/playlist?list=PLNnqqvK2yDEFVdM_5wV4Od8kV2GaSo7jz

https://warosu.org/lit/thread/24673316#p24673316

https://amateurlogician.com/mathematics-physics/

https://archive.4plebs.org/pol/thread/515019673/#515019673
>>
Thank you all for your recommendations.
>>
https://www.zhibit.org/diemythographer/die-mythographer-die/occasional-letter-number-one-2006

https://archive.org/details/easylessonsonrea00whatuoft

https://babel.hathitrust.org/cgi/pt?id=pst.000003010372

https://babel.hathitrust.org/cgi/pt?id=hvd.hxjnv6

https://archive.org/details/elementsoflogic04what

https://archive.org/details/elementsofrheto00whatuoft

https://www.logicmuseum.com/wiki/Authors/Ockham/Summa_Logicae

https://books.google.com/books?id=IcgAAAAAMAAJ

https://annas-archive.org/md5/fb7021b4951d69c14b5872ed3a994cfb

amateurlogician.com
>>
Euclid's elements has for thousands of years been the book to read, it is mentioned by name several times in the lit top 100 books and his geometry and tradition even more, it's a shame that it has been allowed to be ignored for so long
>>
https://youtu.be/AOcy6RHw7A8
>>
>>24943510
Hey anon is there any book equivalent to the Socratic Logic book that introduces Scholastic Logic? I saw you talking about Ockham in the other thread but I want to be a Scotist.
>>
>>24945566
I think Socratic Logic by Peter Kreeft is a book in the Scholastic tradition. This too:

https://archive.org/details/logicorrightuseo00watt
https://archive.org/details/logick_2507_librivox
table of contents:https://www.heritagebooks.org/content/Logicsample.pdf

There is also:
https://archive.org/details/manualofmodernsc02merc/page/133/mode/1up

Listen to this:
https://m.youtube.com/playlist?list=PLNnqqvK2yDEFVdM_5wV4Od8kV2GaSo7jz
>>
An Elementary Treatise on Logic: Comprising the Essential Principles and Different Modes of Reasoning in the Form of Question and Answer by Hezekiah G. Ufford, publication date 1823

https://archive.org/details/anelementarytre00uffogoog
>>
>>24944819
Thanks anon
>>
>the philosophy majors are turning the first logic chapter from a discrete mathematics book into a semester long borefest that doesn't even get to the interesting applications of logic like circuit design again
>>
https://youtu.be/yJxiWmmJ3dc
>>
https://annas-archive.org/md5/6d52684635541350d724c7da5ded95e8



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