In order to clarify this, we give a few examples.
Let *A* be a fuzzy interval *between* 5 *and* 8 and *B*
be a fuzzy number *about* 4.
The corresponding figures are shown below.

The following figure shows the fuzzy set *between* 5 *and* 8
**AND** *about* 4 (notice the blue line).

The Fuzzy set *between* 5 *and* 8 **OR** *about* 4
is shown in the next figure (again, it is the blue line).

This figure gives an example for a negation. The blue line is the **NEGATION**
of the fuzzy set *A.*

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