sets representing some temperature. in a given application, there is the need to represent a cool and warm temperature. like in real life, the precise point when the temperature changes from cool to warm is not easy to find, and does not makes sense. if we consider the cool around 20 degrees and warm around 30 degrees, it is not simple to find a break point. if we take the mean, we can consider values greater than or equal 25 to be warm. but we can still consider 25 a bit cool. and a bit warm at the same time. this is where fuzzy sets can help.
fuzzy sets are often 