Frames are large, structured units. A major benefit is that frames provide a large amount of structured information that can be invoked from a small ``trigger''. This is essential for intelligence:

• An intelligent being never gets complete, consistent information about the world.

• An intelligent being must jump to conclusions and make assumptions based on what is usual.

• Sparseness of the universe makes this work: only a few things are possible.

Problems with Frames

• Inheritance can cause trouble.

• There is more than one way to break down the world into taxonomies.

• Inference tends to become complex and ill-structured.

• Frames are good for representing static situations; they are not so good for representing fluents, things that change over time.

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