Google honors the English mathematician, educator, philosopher and logician George Boole with an animated doodle on the homepage. It seems to be difficult to understand, but after reading this article you will agree: it’s quite simple. George Boole was born on November 2nd, 1815 – 200 years ago. So here is what the doodle shows:

The doodle animation has four conditions. If you look at the screenshots you can see the principle behind it.

First of all: the small „g“ of the logo shows two black circles:

- The circle above is either black or it shows a „x“.
- The circle below is either black or it shows a „y“.

Below the other chars there are some logical terms.

### Condition 1

The terms of char „G“ and „o“ are active. That means:

- [
*Show*] „x AND y“ - [
*Show*] „x OR y“ - The second one doesn’t change anything so the „x“ and „y“ are visible.

### Condition 2

Here are the „l“ and the „e“ activ.

That means:

- [
*Show*] „NOT y“ - [
*Show*] „NOT x“

So neither an „x“ nor a „y“ are visible.

### Condition 3

Now it get a little more complicated. There are two „OR“ that means here the same :-)

The both „o“s say

- [
*Show*] either „x“ OR „y“

The green „l“ says:

- [
*Show*] „NOT y“

So it’s logical the there is only the „x“ visible.

### Condition 4

Nearly the same, but instead of the „l“ is now the „e“ active:

- [
*Show*] „NOT x“

Of course only the „y“ is visible.

Simple, isn’t it. Or what do you think about it? Here is the same explanation as a short video:

### George Boole Biografie

George Boole was born on 2 November 1815. He was an English mathematician, educator, philosopher and logician. He worked in the fields of differential equations and algebraic logic, and is best known as the author of *The Laws of Thought*.

More about his life and works (Wikipeda) or an the George Boole Homepage.

*This is the english version of my german article „Die Logik hinter dem George Boole Google Doodle„.*

Category: Google Doodle | Author: Martin Missfeldt 1 Kommentar

Math is not my strong suit but this article seemed interesting enough. Finally some equation which even I can understand :)