If you arrived here from http://www.squl.org/, then you are looking at the official Faish website.
Faish is an implementation of the Squl programming language. Squl is intended to be a declarative language (like Prolog, but without nasty bits) to aid in development of an Artificial General Intelligence.
Somewhere on this page is a link to "Faish_0.1.zip". This contains Windows and Linux versions of Faish. Macintosh (and Solaris) users can run it too, but they will need to find their own virtual machine.
Windows:
Unzip the zip file somewhere and double-click on Faish.exe.
Linux:
Unzip the zip file somewhere and double-click on Faish.sh, or in a console window, run "faish faish.im".
Others:
Download Cincom VisualWorks Smalltalk from http://www.cincomsmalltalk.com/ for your platform, locate the bin/visual executable for your platform and follow Cincom's documentation to run the faish.im image.
Alternatively, check out the source code and see the instructions in readme.txt.
Beware: Faish 0.1 does not warn you to save your work if you accidentally close all windows. This is one of the many known bugs.
When started, you should get a "Your Modules" window. Click on "New", choose a nice name, then double-click on the resulting module to open a module editing window.
In the "module editing window", you will see three panes. The left pane shows your statements. The right pane shows your queries. The bottom pane is where you edit whatever you just clicked on.
Enter the text "father:alfred of:bob." (remember the full-stop at the end!) and press CTRL-Enter.
Now enter the text "father:X of:Y?" (remember the question-mark!) and press CTRL-Enter.
To save your work, either export your module to a file or repository, or "Commit" the image (which will save all modules and windows in faish.im).
Now go read the documentation.
Faish is released under the MIT license. If you do anything cool with it, let me know on the mailing list! If you make bucketloads of money with it, feel free to send some my way.