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originally posted by: FyreByrd
originally posted by: Starbuck799
originally posted by: FyreByrd
originally posted by: Starbuck799
originally posted by: FyreByrd
originally posted by: MongolianPaellaFish
* evidence
* reason
* logic
* analysis
Excellent - How do you acquire your evidence? How do you decide what is valid evidence?
Valid evidence:
Look up and study something called syllogisms. It is also part of the study of philosophy, logic is also part of the study of philosophy. Just about all the topics you are discussing here are included in the study of philosophy. You should take a course or read a bunch of philosophy books.
A syllogism can be valid and the conclusion false.
If A
and B
then C
as in:
All terriers are dogs.
All terriers are mammals.
Therefore, All mammals are dogs.
Are all mammals, in your experience, dogs?
Formal logic is only a small part of 'how we know'.
I can't remember the rule off hand, but I do know that you can't play with syntax in syllogisms, or something to that effect. As with terriers and dogs, since they are the same thing. If you do, then like you said, the conclusion is invalid, even if the premisses are valid.
It should read this way:
All terriers are dogs.
All dogs are mammals.
Therefore, All terriers are mammals.
But it isn't, is it? Your point please?
originally posted by: Starbuck799
originally posted by: FyreByrd
originally posted by: Starbuck799
originally posted by: FyreByrd
originally posted by: Starbuck799
originally posted by: FyreByrd
originally posted by: MongolianPaellaFish
* evidence
* reason
* logic
* analysis
Excellent - How do you acquire your evidence? How do you decide what is valid evidence?
Valid evidence:
Look up and study something called syllogisms. It is also part of the study of philosophy, logic is also part of the study of philosophy. Just about all the topics you are discussing here are included in the study of philosophy. You should take a course or read a bunch of philosophy books.
A syllogism can be valid and the conclusion false.
If A
and B
then C
as in:
All terriers are dogs.
All terriers are mammals.
Therefore, All mammals are dogs.
Are all mammals, in your experience, dogs?
Formal logic is only a small part of 'how we know'.
I can't remember the rule off hand, but I do know that you can't play with syntax in syllogisms, or something to that effect. As with terriers and dogs, since they are the same thing. If you do, then like you said, the conclusion is invalid, even if the premisses are valid.
It should read this way:
All terriers are dogs.
All dogs are mammals.
Therefore, All terriers are mammals.
But it isn't, is it? Your point please?
I don't know, I'm stumped. But I know that your syllogism is incorrect, and doesn't follow the rules. I have to go back to my logic book and see what the rules are for syllogisms.
originally posted by: FyreByrd
originally posted by: Starbuck799
originally posted by: FyreByrd
originally posted by: MongolianPaellaFish
* evidence
* reason
* logic
* analysis
Excellent - How do you acquire your evidence? How do you decide what is valid evidence?
Valid evidence:
Look up and study something called syllogisms. It is also part of the study of philosophy, logic is also part of the study of philosophy. Just about all the topics you are discussing here are included in the study of philosophy. You should take a course or read a bunch of philosophy books.
A syllogism can be valid and the conclusion false.
If A
and B
then C
as in:
All terriers are dogs.
All terriers are mammals.
Therefore, All mammals are dogs.
Are all mammals, in your experience, dogs?
Formal logic is only a small part of 'how we know'.
originally posted by: Starbuck799
When I was younger, before I got a Uni degree in Computer Science, I remember not thinking that logically, more emotionally. As I grew older and programmed computers more, I learned to tone down the emotion, and ramp up the logic. I found that once I started to think more logically in my work, and gained experience in doing that, I brought it to my everyday life more and more. It was just a natural thing to happen, to me anyway. Once you become logical in your thinking, it just happens that you can no longer look at things without applying logic to just about every situation that you come across. I know it sounds cold, but it's not. Thinking logically has helped me in my life immensely. Like I said though, drives some folks nuts.
originally posted by: Aazadan
a reply to: FyreByrd
How do you arrive at what you know? You don't. Every single step of logic that predicates peoples beliefs is ultimately based upon some original assumption being true. Even the assumptions we can prove, rely on some other assumption being true.
As an example, I've been doing a bunch of math proofs lately and even the most basic case of 1+0 = 1 which can be mathematically proven relies on certain assumptions about the meanings of addition, one, and zero and those assumptions can be flawed. If something so basic relies on so many assumptions how can something more complex like the way the economy functions be based on any sort of fact? You can see this with 5 minutes of research too as you'll find many different philosophies of economics, all of which come up with different predictions stemming from any given scenario.
Even science which is based on discovering the truth operates on the fundamental belief that everything currently known is wrong, either flat out wrong or incomplete (usually incomplete in the case of accepted theories).
So in the end, my answer to your question is that people arrive at what they know through the emotional fulfillment faith in certain "grains of truth" give them. But what people know rarely reflects the truth of the world. It is highly probable that everything you know is wrong.
Inference:
An inference is a step of the mind, an intellectual act by which one concludes that something is true in light of something else’s being true, or seeming to be true. If you come at me with a knife in your hand, I probably would infer that you mean to do me harm. Inferences can be accurate or inaccurate, logical or illogical, justified or unjustified.
Assumption:
An assumption is something we take for granted or presuppose. Usually it is something we previously learned and do not question. It is part of our system of beliefs. We assume our beliefs to be true and use them to interpret the world about us. If we believe that it is dangerous to walk late at night in big cities and we are staying in Chicago, we will infer that it is dangerous to go for a walk late at night. We take for granted our belief that it is dangerous to walk late at night in big cities. If our belief is a sound one, our assumption is sound. If our belief is not sound, our assumption is not sound. Beliefs, and hence assumptions, can be unjustified or justified, depending upon whether we do or do not have good reasons for them. Consider this example: “I heard a scratch at the door. I got up to let the cat in.” My inference was based on the assumption (my prior belief) that only the cat makes that noise, and that he makes it only when he wants to be let in.
I really should write a book.
While I work on my own process and understanding, will you share your's with me?