  goal
The world is either in the stated condition [achieved goal} or not. (p14)
A goal is a condition or state of affairs in the world that the actor would like to achieve. It is expressed as an assertion in the representation language.(p33)
How the goal is to be achieved is not specified, allowing alternatives to be considered.(p33)
A goal means it is expected there can be different ways of achieving it [the goal] (alternatives)(p40)
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