Karnik-Mendel algorithms always present two independent procedures for computing the generalized centroid of an interval type-2 fuzzy set: the first one for computing its left part (which is denoted by c <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">l</sub> ), and the second one for computing its right part (which is denoted by c <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> ). This paper presents a simple discussion where we show that the calculation of c <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">l</sub> and c <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> is really the same problem and not two different problems.
