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The frame problem occurs even in very simple domains. A scenario with a door, which can be open or closed, and a light, which can be on or off, is statically represented by two propositions and .
The version of the situation calculus introduced by McCarthy in 1986 differs to the original one by the use of functional fluents (e.g., (,) is a term representing the position of x in the situation s) and for an attempt to use circumscription to replace the frame axioms.
The frame problem is solved by asserting that the situation after the execution of an action is identical to the one before but for the conditions changed by the action. For example, the action of moving the box from the table to the floor is formalized as:
This representation of fluents is used in the event calculus, in the fluent calculus, and in the features and fluents logics. Some fluents can be represented as functions in a different way. For example, the position of a box can be represented by a function o n ( b o x , t ) {\displaystyle on(box,t)} whose value is the object the box is ...
It’s been a week since a woman died in a New York City subway car, set on fire by a homeless, undocumented man. She has yet to be identified and the man charged with her murder says he doesn’t ...
In this podcast episode, Medical News Today shares three actionable resolutions that can help improve brain, heart, and metabolic health in the new year via diet, sleep, and exercise.
We finally—finally—made it to the end of the year.And though the music releases have gone from summer’s deluge to a steady trickle, that doesn’t mean there aren’t some great new songs in ...
The frame problem shows in this example as the problem that is not a consequence of the above formulae, while the door is supposed to stay closed until the action of opening it is performed. Circumscription can be used to this aim by defining new variables c h a n g e _ o p e n t {\displaystyle change\_open_{t}} to model changes and then ...