Fuzzy logic = clear opportunity: what do a 6th-century "philosopher poet" and artificial intelligence have to do with better controls and fault detection? Take a quick primer in fuzzy logic and soon enough, the potential for building automation will come into crisp focus.

Engineered Systems | October 1, 2006| | Copyright

The next sentence is true. But the previous sentence is false.

Epimenides of Knossos (Crete) was a semi-mythical philosopher-poet from the 6th century. One day, in a fit of poetic inspiration, it is said that he proclaimed, "All Cretans are liars!" Being a Cretan himself, he is remembered to this day for the Cretan paradox.

In Aristotelian logic, where something cannot be both true and false at the same time, these self-negating statements cannot be reconciled. If they are true, then they are false, but if they are false, then they are true.

Enter ...

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