It is better not to apply the so called fuzzy logic. The complement of a normal fuzzy set has been so defined that the intersection of a normal fuzzy set and its complement is said to be non-null! Can a statement and its complement have anything in common? Would you call that logical? Accordingly, the negation operation in fuzzy logic is defective. So better do not apply fuzzy logic. Once you apply it, you would find no way to be out of that! Fuzzy logic is known as the cocaine of science, you see!