Abstract

This chapter uses the event calculus for commonsense reasoning, which is based on first-order logic. It reviews several other important approaches to commonsense reasoning: qualitative reasoning, analogical processing, probabilistic reasoning, and the society of mind. Qualitative reasoning is concerned with explaining and predicting the behavior of physical systems. The task is to take as input a description of a physical system and an initial state and produce as output the possible behaviors of the system given the initial state. Here QSIM is explained, a physical system is described by a qualitative differential equation (QDE), which corresponds to an infinite set of ordinary differential equations. A QDE consists of a set of variables and a set of constraints on those variables.

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