Expert System - Australian Flags by McGoo Software

Based on the responses you have made:

The flag is most probably the Norfolk Island flag

Conclusion Notes:

The flag of Norfolk Island was adopted on 17 January 1980. It depicts the Norfolk Island Pine (Araucaria heterophylla) in a central white stipe. The flag's geometry is a triband. It is similar to the flag of Canada (upon which it was based), with its use of only two colours, and incorporating a prominent local floral symbol in the middle. As with the Canadian flag it has a 1:2 ratio. The central stripe is wider than the two outer stripes, the ratio being 7:9:7. The flag bears a striking resemblance to the flag of Lebanon and Nigeria.

Expert System Rule:

IF on the flag the Southern Cross is not visible
AND on the flag there is no Union Jack present
AND the field of the flag is green and white vertical stripes
THEN the flag is most probably the Norfolk Island flag.

Calculated Certainty Factor: 0.77 = most probably