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**)? · What **does** 6÷2(**1**+2)
...

www.quora.com/When-does-one-plus-one-not-equal-two-1

If 2 is **not 1**+**1**, then the notation is ill-conceived. Sometimes people make (ironic)
analogies like "corporate synergy happens when **1**+**1**=3", but that's generally ...

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.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 ...