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## #1 2006-11-09 17:41:48

haruka-san
Member
Registered: 2006-11-08
Posts: 205

### Symbolic Logic

i know that the term LOGIC is very familiar.. actually we have this subject SYMBOLIC LOGIC.. we havent started yet the classes..i am just confused,, is it the same with the subject logic? how does it differ from one another?? anybody who has an idea??

thanks..

Dont compare your life to others. You have no idea what their journey is all about. ^_^

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## #2 2006-11-10 09:28:08

Ricky
Moderator
Registered: 2005-12-04
Posts: 3,791

### Re: Symbolic Logic

Symbol logic is simply expressing a statement with symbols.

Let:

M = Mary likes cheese
B = Bob hates milk
R = Robert feels sick
S = Sally won the game

So

If Mary likes cheese and Bob hates milk or Robert feels sick, or Mary does not like cheese and Bob does not hate milk, then Sally won the game.

Becomes:

( (M^B)vR ) v(~M ^ ~B) -> S

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

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## #3 2006-11-10 09:58:46

luca-deltodesco
Member
Registered: 2006-05-05
Posts: 1,470

### Re: Symbolic Logic

i thought ¬ was used negation?
like ¬A as opposed to ~A

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## #4 2006-11-10 18:19:09

haruka-san
Member
Registered: 2006-11-08
Posts: 205

### Re: Symbolic Logic

Ricky wrote:

Symbol logic is simply expressing a statement with symbols.

Let:

M = Mary likes cheese
B = Bob hates milk
R = Robert feels sick
S = Sally won the game

So

If Mary likes cheese and Bob hates milk or Robert feels sick, or Mary does not like cheese and Bob does not hate milk, then Sally won the game.

Becomes:

( (M^B)vR ) v(~M ^ ~B) -> S

WOW! thanks it helps a lot..

Dont compare your life to others. You have no idea what their journey is all about. ^_^

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## #5 2006-11-10 21:56:46

Ricky
Moderator
Registered: 2005-12-04
Posts: 3,791

### Re: Symbolic Logic

i thought ¬ was used negation?
like ¬A as opposed to ~A

There are tons of ways:

Are all notations I've seen.  Some with a more computer science oriented background may even use !A.

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

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## #6 2006-11-12 15:56:11

haruka-san
Member
Registered: 2006-11-08
Posts: 205

### Re: Symbolic Logic

at last i found a book in symbolic logic! yehey!!
i have read the first chapter and i think studying symbolic logic will be fun.. am i right??

Dont compare your life to others. You have no idea what their journey is all about. ^_^

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## #7 2006-11-12 17:31:10

Ricky
Moderator
Registered: 2005-12-04
Posts: 3,791

### Re: Symbolic Logic

I wouldn't say it's exactly fun.  It's mostly simple to the point of it being tedious.

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

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