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whats 2 + 2?

Name: Anonymous 2005-11-09 16:17

?

Name: Anonymous 2005-11-09 16:23

2+2 is defined to be the symbol 4

Name: Anonymous 2005-11-09 16:25

5, FOR BIGGER VALUES OF 2. HOHOHOHOHOHOO

Name: Anonymous 2005-11-10 8:20 (sage)

2 company, 3's a crowd. therfore 2+2 is a gangbang.

Name: Anonymous 2005-11-10 9:48

"2 + 2" is a visual representation of a string of bits when treated as UTF-8.

Name: Anonymous 2005-11-15 2:56

FISH

Name: Anonymous 2005-11-15 14:09

4, lol.

Name: Anonymous 2005-11-15 14:41

>>7
TIME PARADOX

Name: Nova 2005-11-22 7:06

>>8
SNAKE IS DEAD

Name: Anonymous 2005-11-22 10:59

2 is the loneliest number after 1 so 2 + 2 is as lonely as 1 would be if it was 2 squared times the double of that

Name: Anonymous 2005-11-22 13:48

SCIIIIEEEEEENNNNNCNCCCCCE!

Name: Anonymous 2005-11-23 2:16

>>7
135 IQ

Name: Anonymous 2005-11-23 2:48

what is 2+2 is obviously 4, what is more interesting is what is the point of this thread?

Name: Anonymous 2005-11-23 16:24

To prove that 2+2=4 we'll need a specification consisting of:

A constant, 0
A unary function, succ

With these two we can represent all positive integers


A binary function, +
Two variables, x, y

Define the semantics of + as:

1) 0 + x = x
2) succ(x) + y = succ(x + y)


Let 2 be an alias for succ(succ(0))
Let 4 be an alias for succ(succ(succ(succ(0))))


succ(succ(0)) + succ(succ(0)) =? succ(succ(succ(succ(0))))

rewrite using rule 2

succ(succ(0) + succ(succ(0))) =? succ(succ(succ(succ(0))))

rewrite using rule 2

succ(succ(0 + succ(succ(0)))) =? succ(succ(succ(succ(0))))

rewrite using rule 1

succ(succ(succ(succ(0)))) =? succ(succ(succ(succ(0))))

we've reached normal form, and the two sides match. zomg hacks!

Name: Anonymous 2005-11-23 16:51

>>14
 that kinda succs

Name: Anonymous 2005-11-23 17:27

>>15

:))

Name: Anonymous 2005-11-24 13:38 (sage)

>>16

:D:D

Name: Anonymous 2005-11-26 18:23

>>14

Lambda, lately?

Name: Anonymous 2005-11-26 23:46

Haha, this thread made me cry and laugh at the same time.

I understand whats going on, but I'm not quite sure what succ() is representing here.

Name: Anonymous 2005-11-26 23:48

>>10
2 is way down there with regards to lonely numbers; anything above fifty or so and any idividual one in any number is basically as lonely as 1.  It's possible to be more alone in a crowd that it is completely alone you know?

Name: Anonymous 2005-11-27 11:58

>>19
succ(x) = x+1

Name: ooo.soo.kewlioo 2005-11-28 18:11

22... im guessing. but this thread is not funny

Name: Anonymous 2005-11-28 19:30

This is how I understand it (admitingly not great at math):

The concept of 2 plus the concept of 2 equals the conept of 4.
The arbirary symbol we give meaning to these concepts don't matter.

I see this happen in the real world. I get 2 apples and put it next 2 other apples. I declare I have 4 apples.

But what bugs me is some very wierd concepts thrown at me by people in abstract math, or even 1984. Or something. Can 2+2=5 ever? And I'm not talking about the symbols, but the concept of those numbers.

And they keep telling me subtraction really doesn't exist. And how does Godels inconsistency theorems play a role in this?
Is math an a priori synthetical?

Name: Anonymous 2005-11-28 19:54

x - y = x + (-y)

Name: Anonymous 2005-11-28 20:49

>>20
yeah i knew that, thats textbook

Name: Anonymous 2005-11-30 14:44

>>23
If you have two(2) ropes, with two (2) knots on either one. You tie them together and get another knot. This makes five knots from adding two (2) knots and two (2) knots together, without using any rope except for that which you already had. 2 + 2 = 5

If 2+2=5, then what is 2-1?

Name: Anonymous 2005-11-30 15:09

2-1=x ---> 2=x+1 ---> 2+2=5 --->
(x+1)+(x+1)=5 ---> 2x=3 ---> x=1,5

conclusion 2-1=1,5

Name: Anonymous 2005-12-01 3:41

Yay.

Name: Anonymous 2005-12-01 8:58

>>26
>>27
how flawed can logic be?

Name: Anonymous 2005-12-01 13:56

>>29
Is this Jeapordy? ;p

Name: Chris Rock 2005-12-07 23:39 (sage)

what's 2 plus 2?

MARTIN LUTHUR KING!

Name: Anonymous 2005-12-13 13:05 (sage)

2 times as many corolai

Name: reversial 2005-12-16 16:34

2+2, along with all other math problems, has been successfully proven to have the value of "42".

Name: Anonymous 2005-12-17 1:10

you asses! 2+2 is 22!

Name: Anonymous 2005-12-17 8:27 (sage)

2+2 = 22 LOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOL

Name: d !!4B6jPNLtPY3paAd 2009-09-06 15:35

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Name: d !RZ4RzcyXHg 2009-09-06 15:36

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Name: d !!4B6jPNLtPY3paAd 2009-09-06 15:37

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