Once upon a time, I developed systems using Egeria, the language of an expert system. It had a really useful function, where the variables had three values: min, max and current. Thus, the probability of a partially known value can be calculated, with the results ending as a range. I can’t remember the syntax, but it was something like this: -
A.Min = 1;
A.Max = 5;
A.Current= 4;
B.Min = 2;
B.Max = 4;
B.Current= 4;
A * B = {2, 20, 16}
My question is what is called this approach, and do any of its current languages execute?
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