lotfi zadeh gzrdacsberkeleyedu message follows unconventional uai intended draw attention uai community concept may shed light many basic concepts operational definitions exist among concepts causality relevance summary recession pornography mountain many others one principal objectives ai mechanization reasoing questionanswering reasoning involves knowledge much human knowledge expressed natural language implies large measure mechanization reasoning questionanswering reduces mechanization deduction data expressed natural language prerequisite deduction data expressed natural language precisiation meaning illustrate assume datum p swedes tall question q average height swedes clearly answer question necessary precisiate meaning tall proposition p expressed natural language precisiated key idea described paper precisiated natural language pnl ai magazine vol 25 3 7491 2004 represent meaning p generalized constraint form x isr r x constrained variable r constraining relation r indexing variable whose value defines modality constraint semantics principal constraints possibilistic rblank veristic rv probabilistic rp usuality ru random set rrs fuzzy graph rfg bimodal rbm group rg primary constraints probabilistic possibilistic veristic standard constraints constraints underlie standard logic probability theory bivalent possibilistic bivalent veristic probabilistic generalized constraint precisiates meaning p referred precisiand p denoted gcp point basic importance p may precisiated many different ways giving rise precisiands gc1p gcnp precisiand gcp cointensive p intension gcp close approximation p intension used technical sense meaning p perspective problem precisiation picking generalized constraint whose intension meaning close intended intension meaning p illustrate p speed limit 65 mph precisiand gcp speed less equal 70 mph allowed speed 70 mph allowed cointensive cointesive precisiand would gcp speed less 70 mph probability getting ticket low speed 70 mph 80 mph probability medium 80 mph probability high definition concept c may viewed precisiation proposition x c c fuzzy concept c matter degree general exist cointensive precisiand p within class standard constraints reason one find cointensive definitions concepts literature means cointensive definitions concepts causality relevance summary recession pornography mountain formulated within conceptual structure standard logic probability theory agree conclusion try define meant mountain tue 05 aug 2008 232515 0800 uai concept cointensive precisiation