Expert System - Australian Flags by McGoo Software

Based on the responses you have made:

The flag is probably the flag of the Northern Territory

Conclusion Notes:

The Northern Territory was founded as a Federal Territory on 1 January 1911, but its first flag was not hoisted until self government was attained on 1 July 1978. The flag was designed by Robert Ingpen, a Victorian illustrator, and incorporates both the Territorian colours and floral emblem. In the centre of the fly is a stylised Sturt's Desert Rose with seven petals on an ochre field. At the hoist is the Southern Cross in white on a black panel. Note that the Southern Cross is of the Victorian form, with the number of points on the stars ranging from five to eight.

Expert System Rule:

IF on the flag the Southern Cross is visible
AND on the flag there is no Union Jack present
AND the field of the flag is black and brown
THEN the flag is probably the flag of the Northern Territory.

Calculated Certainty Factor: 0.69 = probably