# What is formal and informal logic?

Check our answers to ‘What is formal and informal logic?’ - we found 46 replies and comments relevant to this matter. The best answers are submitted by users of Yahoo! Answers, ChaCha and Quora.

## Best solution

• ### What's formal logic and nonformal logic?

what's formal logic and nonformal logic,and what's the difference beween them. can you take some examples to depict and demonstrate that? thanks

Again, there are people on here just spitting out the first thing they think of. Obviously, the people...

## Other solutions

• ### What was the title of the cool series in which the mathematician Euclid organized and applied formal logic to geometry Euclid organized and applied formal logic to geometry?

The title was called Elements, that made references to the geometry and other mathematics known in his...

• ### Formal Logic : ~((p -> q) -> q) |- ~p v (p -> q) What a complicated problem that i have to solve?

Formal Logic Natural Deduction

1. ~((p -> q) -> q) ......... premise 2. ~((~p \/ q) -> q) ......... 1, material implication...

• ### What is formal logic and scientific reasoning?

Formal logic, noun, is the study of the properties of propositions and deductive reasoning by abstraction...

• ### What are some examples of things that cannot be explained by logic?

In this very interesting blog post, http://apenwarr.ca/log/?m=201407#01 a point is made about how "smart" people, particularly "smart" computer people, have a tendency to rationalize the world. They believe that the correct answer...

The Burmese bandit from The Dark Knight! Bruce Wayne: Criminals aren't complicated, Alfred. Just have...

• ### What are some examples in reality, mathematics, logical theory or any other areas that challenge logic as a reasoning tool? Please see question details before answering...

Edit 2 -- Apparently, someone still thinks I need to clarify my question some more. I hope this will make it clearer. The answer I am looking for, is like the answer William Oliver gave for a question similar to mine right here: William Oliver's answer...

-Edit- the OP appears to have altered the question details... And again the details show lack of understanding...

• ### What is formal logic?

Formal logic, noun, is the study of the properties of propositions and deductive reasoning by abstraction...

• ### What is logic and how does it work?

Here's my problem (which seems stupid and may or may not be stupid): I don't know what logic is. Or rather, I don't know why logic 'works'. Logic is the underlying principle behind everything, right? All our justifications are based on logic. Every time...

Pardon me ahead of time for the lengthy and, at times, undoubtedly foolish words which follow. I hope...