Expert System - Australian Flags by McGoo Software

Based on the responses you have made:

The flag is most probably the state flag of Tasmania

Conclusion Notes:

The flag of Tasmania is a British Blue Ensign defaced with the state badge. The badge depicts a red lion passant on a white disc. The exact symbolism of the badge is unknown, other than to indicate historical ties with England. The badge was approved by the British Colonial office in 1875 and the design of the Tasmanian flag has remained unchanged since then, save for a slight alteration in the rendition of the lion in 1975 when the flag was officially proclaimed as the "Tasmanian Flag".

Expert System Rule:

IF on the flag the Southern Cross is not visible
AND on the flag there is a Union Jack present
AND the symbol on the fly of the flag looks like a lion
THEN the flag is most probably the state flag of Tasmania.

Calculated Certainty Factor: 0.78 = most probably