Tomasz Rola <rtomek at ceti.pl> mentioned Null-A Tomasz, have you read Korzybski's 'Science & Sanity'? I can't recommend it highly enough. http://www.generalsemantics.org/store/all-books/56-science-and-sanity-an-introduction-to-non-aristotelian-systems-and-general-semantics.html Ben Zaiboc