en.wikipedia.org/wiki/Mathematical_fallacy

In mathematics, certain kinds of mistaken proof are often exhibited, and
sometimes collected, ... 2=**1**} 2=**1** , but **can** be modified to prove that any number
**equals** any other number. ... Many functions **do not** have a unique inverse. ... For
instance, a naive use of integration by parts **can** be used to give a false proof that
0 = **1**.

mathforum.org/library/drmath/view/57131.html

**1** + **1 does not equal** 2. What is the math equation that proves this?

www.quora.com/Can-it-be-argued-that-1+1-does-not-equal-2-either-from-a-mathematical-or-philosophical-perspective

Let's define **1** as the common feature of all singleton sets. Then let's define 2 as
the common .... Why half **plus** half **equals one** (**1**/2+**1**/2=**1**)? · Is this **equal 1**=**1**/2(2
)? ...

puzzling.stackexchange.com/questions/5656/when-does-11-3

Nov 27, 2014 **...** The following slightly abuses the notion of "**equals**" but in a way that is common
among non-mathematicians (more or less "And the next thing ...

www.debate.org/debates/One-plus-one-does-not-always-equal-two/1

May 2, 2009 **...** I affirm the resolution: "**One plus one does not** always **equal** two." To clarify, the
resolution simply means that **1**+**1**=2 **does not** always happen.

www.purplemath.com/modules/howcan1.htm

That is, if you **do** the subtraction, **1** – 0.999...9 **will not equal** zero. But the point of
the "dot, dot, dot" is that there is no end; 0.9999... is inifinte. There is no "last" ...

www.dailykos.com/story/2008/6/16/535425/-

Jun 16, 2008 **...** The title of this journal insinuated that **1** + **1 does not equal** 2, but rather 10 AND **1**
(technically, in my first example 2 = 10). I stand firm in that ...

blog.computationalcomplexity.org/2011/07/why-did-112-take-russell-and-whitehead.html

Jul 25, 2011 **...** How could they take 300 pages to prove **1**+**1**=2. .... y" or that "**one** apple **plus one**
apple equals two apples" which you **can**'t say .... Ok...if **1** + **1 does not equal** 2
then how want children **do** I have that I **can** claim tax benefits for.