# Cite?!? **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [February 2, 2012, 4:02am UTC](https://boards.straightdope.com/t/cite/611502 "2012-02-02T04:02:16Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Lumpy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lumpy/32/446_2.png) [@Lumpy](https://boards.straightdope.com/u/Lumpy)\ **Post date:** [February 2, 2012, 4:02am UTC](https://boards.straightdope.com/t/cite/611502/1 "2012-02-02T04:02:16Z")
2+2=4 The world is round the sky is blue ---
**Author:** ![Ambivalid](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@Ambivalid](https://boards.straightdope.com/u/Ambivalid)\ **Post date:** [February 2, 2012, 4:06am UTC](https://boards.straightdope.com/t/cite/611502/2 "2012-02-02T04:06:57Z")
Perhaps the sky isn’t blue to everyone. ---
**Author:** ![drewtwo99](https://avatars.discourse-cdn.com/v4/letter/d/d07c76/32.png) [@drewtwo99](https://boards.straightdope.com/u/drewtwo99)\ **Post date:** [February 2, 2012, 4:39am UTC](https://boards.straightdope.com/t/cite/611502/3 "2012-02-02T04:39:12Z")
2+2=4 unless you are doing modular arithmetic for values less than 4, my friend. The world is only round for certain definitions of round. It is more accurately described as an imperfect oblate spheroid. The sky is blue, except when it’s black, pink, orange, red, etc… ---
**Author:** ![Duckster](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/duckster/32/1244_2.png) [@Duckster](https://boards.straightdope.com/u/Duckster)\ **Post date:** [February 2, 2012, 4:40am UTC](https://boards.straightdope.com/t/cite/611502/4 "2012-02-02T04:40:51Z")
You, two, are sure making the OP earns his name. 😃 ---
**Author:** ![Indian](https://avatars.discourse-cdn.com/v4/letter/i/c0e974/32.png) [@Indian](https://boards.straightdope.com/u/Indian)\ **Post date:** [February 2, 2012, 5:43am UTC](https://boards.straightdope.com/t/cite/611502/5 "2012-02-02T05:43:03Z")
Here is your [cite.](http://boards.straightdope.com/sdmb/showpost.php?p=14731484&postcount=1) ---
**Author:** ![Senegoid](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/senegoid/32/6606_2.png) [@Senegoid](https://boards.straightdope.com/u/Senegoid)\ **Post date:** [February 2, 2012, 11:21am UTC](https://boards.straightdope.com/t/cite/611502/6 "2012-02-02T11:21:35Z")
But 2 + 2 = 5 (for extremely large values of 2). We have this [straight from the pen](http://www.straightdope.com/columns/read/1382/does-2-2-5-for-very-large-values-of-2) (or from the keyboard, I suppose) of SDSAB arch-Master Dex. ---
**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\ **Post date:** [February 2, 2012, 1:40pm UTC](https://boards.straightdope.com/t/cite/611502/7 "2012-02-02T13:40:57Z")
> [@Lumpy](#): > > 2+2=4 Here you go ---
**Author:** ![Hal\_Briston](https://avatars.discourse-cdn.com/v4/letter/h/a9a28c/32.png) [@Hal\_Briston](https://boards.straightdope.com/u/Hal_Briston)\ **Post date:** [February 2, 2012, 2:16pm UTC](https://boards.straightdope.com/t/cite/611502/8 "2012-02-02T14:16:03Z")
> [@Lumpy](#): > > 2+2=4 [Cite](http://www.youtube.com/watch?v=2QamU4-8NUw). ---
**Author:** ![Lumpy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lumpy/32/446_2.png) [@Lumpy](https://boards.straightdope.com/u/Lumpy)\ **Post date:** [February 2, 2012, 2:26pm UTC](https://boards.straightdope.com/t/cite/611502/9 "2012-02-02T14:26:31Z")
> [@Ambivalid](#): > > Perhaps the sky isn’t blue to everyone. But what do you mean by “perhaps” and “everyone”? Could you explain those terms? anyone following the Shall Issue thread might have spotted the inspiration for this thread ---
**Author:** ![TriPolar](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/tripolar/32/3008_2.png) [@TriPolar](https://boards.straightdope.com/u/TriPolar)\ **Post date:** [February 2, 2012, 2:47pm UTC](https://boards.straightdope.com/t/cite/611502/10 "2012-02-02T14:47:46Z")
> [@Senegoid](#): > > But 2 + 2 = 5 (for extremely large values of 2). And small values of 5 ---
**Author:** ![Crafter\_Man](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/crafter_man/32/458_2.png) [@Crafter\_Man](https://boards.straightdope.com/u/Crafter_Man)\ **Post date:** [February 2, 2012, 2:49pm UTC](https://boards.straightdope.com/t/cite/611502/11 "2012-02-02T14:49:25Z")
I recall a discussion on the SDMB about an old book on number theory (or was it logic or set theory?) where the author \*\*\*finally \*\*\*proves 1 + 1 = 2 on page 78 (or whatever). ---
**Author:** ![garygnu](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/garygnu/32/2924_2.png) [@garygnu](https://boards.straightdope.com/u/garygnu)\ **Post date:** [February 2, 2012, 3:07pm UTC](https://boards.straightdope.com/t/cite/611502/12 "2012-02-02T15:07:38Z")
Postulation. ---
**Author:** ![SciFiSam](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@SciFiSam](https://boards.straightdope.com/u/SciFiSam)\ **Post date:** [February 2, 2012, 3:34pm UTC](https://boards.straightdope.com/t/cite/611502/13 "2012-02-02T15:34:03Z")
> [@Senegoid](#): > > But 2 + 2 = 5 (for extremely large values of 2). > > We have this [straight from the pen](http://www.straightdope.com/columns/read/1382/does-2-2-5-for-very-large-values-of-2) (or from the keyboard, I suppose) of SDSAB arch-Master Dex. If you’re rounding up the answer, shouldn’t you also round up the input, and say 3+3=5? (Unless it’s 2.76 or higher, in which case it’d be the more expected 3+3=6). ---
**Author:** ![Lumpy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lumpy/32/446_2.png) [@Lumpy](https://boards.straightdope.com/u/Lumpy)\ **Post date:** [February 2, 2012, 3:44pm UTC](https://boards.straightdope.com/t/cite/611502/14 "2012-02-02T15:44:40Z")
> [@SciFiSam](#): > > If you’re rounding up the answer, shouldn’t you also round up the input, and say 3+3=5? (Unless it’s 2.76 or higher, in which case it’d be the more expected 3+3=6). Not rounding up, rounding to the closest integer. ---
**Author:** ![Gyrate](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/gyrate/32/3588_2.png) [@Gyrate](https://boards.straightdope.com/u/Gyrate)\ **Post date:** [February 2, 2012, 3:51pm UTC](https://boards.straightdope.com/t/cite/611502/15 "2012-02-02T15:51:38Z")
> [@Lumpy](#): > > 2+2=4 No, [here you go](http://en.wikipedia.org/wiki/Principia_Mathematica). If you wanted an actual proof the whole thing is online at the UMichigan website but I’m not digging through it for you. ---
**Author:** ![SciFiSam](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@SciFiSam](https://boards.straightdope.com/u/SciFiSam)\ **Post date:** [February 2, 2012, 4:16pm UTC](https://boards.straightdope.com/t/cite/611502/16 "2012-02-02T16:16:26Z")
> [@Lumpy](#): > > Not rounding up, rounding to the closest integer. Isn’t 3 the closest integer to 2.6? ---
**Author:** ![Malacandra](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@Malacandra](https://boards.straightdope.com/u/Malacandra)\ **Post date:** [February 2, 2012, 4:54pm UTC](https://boards.straightdope.com/t/cite/611502/17 "2012-02-02T16:54:46Z")
> [@SciFiSam](#): > > If you’re rounding up the answer, shouldn’t you also round up the input, and say 3+3=5? (Unless it’s 2.76 or higher, in which case it’d be the more expected 3+3=6). Yabbut, 2.4 doesn’t round up to 3, it rounds down to 2; but 4.8 rounds up to 5. ---
**Author:** ![Freddy\_the\_Pig](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@Freddy\_the\_Pig](https://boards.straightdope.com/u/Freddy_the_Pig)\ **Post date:** [February 2, 2012, 5:28pm UTC](https://boards.straightdope.com/t/cite/611502/18 "2012-02-02T17:28:34Z")
This whole thread is crimethink. Two plus two is whatever the party says it is. ---
**Author:** ![Giles](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/giles/32/60_2.png) [@Giles](https://boards.straightdope.com/u/Giles)\ **Post date:** [February 2, 2012, 5:42pm UTC](https://boards.straightdope.com/t/cite/611502/19 "2012-02-02T17:42:12Z")
> [@Lumpy](#): > > 2+2=4 Well, it all depends on how you define things. Let’s take the following definitions: 2 is defined as 1+1 3 is defined as 2+1 4 is defined as 3+1 Then: 2+2=2+(1+1)=(2+1)+1=3+1=4 Quod erat demonstrandum ---
**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\ **Post date:** [February 2, 2012, 6:14pm UTC](https://boards.straightdope.com/t/cite/611502/20 "2012-02-02T18:14:09Z")
> [@Gyrate](#): > > No, [here you go](http://en.wikipedia.org/wiki/Principia_Mathematica). If you wanted an actual proof the whole thing is online at the UMichigan website but I’m not digging through it for you. That’s nice, and all, but careful reading of the question can save time and effort. The OP didn’t ask for proof. Just a citation. [Next page](https://boards.straightdope.com/t/cite/611502.md?page=2)