There really are 10 types of people in the world. Some would argue that there are more, some would argue that there are less. Both are right. They are also both wrong. Perhaps there are only 10 types of people in the world. Whether that is correct or not depends on your point of view. ...

A perfect example of point of view, at least in the world of the written word, can be shown in the very next line:
A

How many of you know what I meant by that? Looking it up at dictionary.com I get a few possibilities:

–noun, plural A's or As, a's or as. 1. the first letter of the English alphabet, a vowel.2.	any spoken sound represented by the letter A or a, as in bake, hat, father, or small. 
3.	something having the shape of an A. 
4.	a written or printed representation of the letter A or a. 
5.	a device, as a printer's type, for reproducing the letter A or a. 

—Idioms6.	from A to Z, from beginning to end; thoroughly; completely: He knows the Bible from A to Z. 
7.	not know from A to B, to know nothing; be ignorant.

As well as:

–indefinite article 1.	not any particular or certain one of a class or group: a man; a chemical; a house. 
2.	a certain; a particular: one at a time; two of a kind; A Miss Johnson called. 
3.	another; one typically resembling: a Cicero in eloquence; a Jonah. 
4.	one (used before plural nouns that are preceded by a quantifier singular in form): a hundred men (compare hundreds of men); a dozen times (compare dozens of times). 
5.	indefinitely or nonspecifically (used with adjectives expressing number): a great many years; a few stars. 
6.	one (used before a noun expressing quantity): a yard of ribbon; a score of times. 
7.	any; a single: not a one.

And also:

 
Symbol. 1.	the first in order or in a series. 
2.	(sometimes lowercase) (in some grading systems) a grade or mark, as in school or college, indicating the quality of a student's work as excellent or superior. 
3.	(sometimes lowercase) (in some school systems) a symbol designating the first semester of a school year. 
4.	Music. 	a.	the sixth tone in the scale of C major or the first tone in the relative minor scale, A minor. 
b.	a string, key, or pipe tuned to this tone. 
c.	a written or printed note representing this tone. 
d.	(in the fixed system of solmization) the sixth tone of the scale of C major, called la. 
e.	the tonality having A as the tonic note. 

5.	Physiology. a major blood group, usually enabling a person whose blood is of this type to donate blood to persons of group A or AB and to receive blood from persons of O or A. Compare ABO system. 
6.	(sometimes lowercase) the medieval Roman numeral for 50 or 500. Compare Roman numerals. 
7.	Chemistry. (formerly) argon. 
8.	Chemistry, Physics. mass number. 
9.	Biochemistry. 	a.	adenine. 
b.	alanine. 

10.	Logic. universal affirmative. 
11.	British. a designation for a motion picture recommended as suitable for adults. Compare AA (def. 5), U (def. 5), X (def. 9). 
12.	a proportional shoe width size, narrower than B and wider than AA. 
13.	a proportional brassiere cup size, smaller than B and larger than AA. 
14.	a quality rating for a corporate or municipal bond, lower than AA and higher than BBB.

That is a lot of possible meanings, and there are quite a few more on the page. However, what I meant isn't even in that resource. A is the hexadecimal numeral that represents the number 10. Just a simple example of how much we don't know. In fact, in looking at the dictionary.com page I learned quite a bit I didn't know. I'd say, it's fair to assume that we don't know what people are "really" talking about most of the time. Perhaps we should check and make sure at the end of the conversation.

That really is the point of the article. There are lots of different ways to say one thing and one thing can say a lot of different things. So what are the 10 types of people in the world? Those who understand binary, and those who don't. Didn't you know that's what I was talking about?:p