[IxDA Discuss] Boolean AND & OR in a graphical user interface

[Pietro Bassi]

Hi everybody,
let me introduce myself: I'm studying Interaction Design in Rome, and 
I've been a lurker of this list for about a year.

My question is: what's the best (most intuitive and effective) way to 
represent Boolean AND and OR operators in a GUI,  in your opinion?

Some background information: the user is not familiar with Boolean 
logic, and he needs to choose from a closed set of about 10 different 
options, combining those options with AND and OR logical operators.

Any examples or ideas?

I hope my question doesn't sound too silly. Thanks in advance for your help.

Cheers,
Pietro