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Conclusions, remarks, and acknowledgements


The present paper is exploratory. The large number of approximate concepts we discuss are approximate in different ways, but we don't have a classification.

Many of the applications of approximate objects will result from theories connecting different levels and kinds of approximation.

I thank Eyal Amir, Johan van Benthem, Sasa Buvac, Tom Costello, Aarati Parmar for helpful comments.

This research has been partly supported by ARPA contract no. USC 621915, the ARPA/Rome Laboratory planning initiative under grant (ONR) N00014-94-1-0775 and ARPA/AFOSR under (AFOSR) grant # F49620-97-1-0207.

John McCarthy
Wed Feb 2 15:59:04 PST 2000