This post discusses a computer program that you can download to try yourself (and get the source code if you want to make your own version).

At a family reunion earlier this summer, we were handed a wordfind that someone had generated somewhere on the Internets that contained the names of the family founders. I was solving mine and noticed that, as anyone has frequently observed, in any given wordfind you will find words that are not in the list. Presumably, this is due to the randomly-assorted letters, by chance, spelling out an unplanned word. Of course, the wordfind makers might also stick those in on purpose (for example, the family wordfind contained the website name multiple times) or purposely prevent some random words (profanity). Regardless, I began to wonder how often a word might appear in a word find just by chance. So I used the margins to scratch out a formula for the chance of finding a word of a certain length within a matrix of random letters.

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A simple model of selection

Inspired by Dawkins’ METHINKS IT IS LIKE A WEASEL program (hereafter just weasel) described in his book “The Blind Watchmaker,” and wanting to practice my blossoming C++ skills, I decided to write my own version of weasel. It was successful enough, and I found the results interesting enough to warrant discussion. Download the program (Windows .exe file) so you can try it out for yourself (and you can also get the source code if you want). In this post I’ll discuss what the program does and why. In the next post I’ll talk a bit about the results of the program.


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