[rocqua]

Fuzzy logic uses very different rules.

It is common to saysthat the 'truthiness' of (a and b), is the minimum truthiness of a and b. Or becomes a maximum, not becomes 1 - truthiness. Then normal predicate logic works by combining these rules the usual way. E.g. (a implies b) becomes b or not a, which is max(b, 1-a).

Basyan probability is much more sophisticated, but also more difficult to calculate.