>>16753531
>>16753578
If you're interested in studying logic there are a ton of free materials online.
https://archive.4plebs.org/pol/thread/508076799
https://archive.4plebs.org/pol/thread/512205412/#512207103
The most important thing to study in your life is the trivium, ie grammar, logic and rhetoric. For grammar study Latin, for logic study not only informal fallacies but also formal logic. Rhetoric is the subject of the three I know the least about but from my understanding I can say a few things.
Grammar, logic and rhetoric used to be taught as interconnected subjects, as a unified system, which this book reflects, it says it's about logic but really parts one and two are what we would call grammar, part three is what we would call logic and part four is what we would call rhetoric.
https://archive.org/details/logicorrightuseo00watt
Grammar, logic and rhetoric are not separate, but a unified system, interconnected subjects, and are the tools of thought. You can think of it as short, intermediate and long modes of conveying meaning in a text or speech. Grammar deals with the meaning in a short collection of words, such as a part of a sentence. Logic deals with the meaning in a longer collection of words, such as a sentence, or a few sentences. Rhetoric deals with the meaning in an even longer collection of words, such as a paragraph, a verse, a chapter etc. Metaphor is one example of what rhetoric deals with. Another is the enthymeme. Introduction to logic by Irvin Copi has a good section about enthymemes.
https://en.wikipedia.org/wiki/Enthymeme