AI software is often adeclarative model-based executable knowledgelevel nondeterministic complex adaptive system. These article describes all these features as well as their implications for verification and validation. To appear, Foundations 02: A V&V Workshop; October 22-23, 2002Kossiakoff Conference & Education Center, Johns Hopkins U. Applied Physics Lab Laurel, Maryland USA. Home page: http://www.sisostds.org/webletter/siso/iss_86/art_493.htm . Download this paper at http://tim.menzies.com/pdf/02vvai.pdf . WP ref: wp/02/aivv/aivvis-v2.