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diff --git a/fuzzylite/fl/defuzzifier/WeightedDefuzzifier.h b/fuzzylite/fl/defuzzifier/WeightedDefuzzifier.h
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+/*
+ Author: Juan Rada-Vilela, Ph.D.
+ Copyright (C) 2010-2014 FuzzyLite Limited
+ All rights reserved
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option)
+ any later version.
+
+ fuzzylite is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with fuzzylite.  If not, see <http://www.gnu.org/licenses/>.
+
+ fuzzylite™ is a trademark of FuzzyLite Limited.
+
+ */
+
+#ifndef FL_WEIGHTEDDEFUZZIFIER_H
+#define FL_WEIGHTEDDEFUZZIFIER_H
+
+#include "fl/defuzzifier/Defuzzifier.h"
+
+namespace fl {
+    class Activated;
+
+    class FL_API WeightedDefuzzifier : public Defuzzifier {
+    public:
+
+        enum Type {
+            Automatic, TakagiSugeno, Tsukamoto
+        };
+        static std::string typeName(Type);
+
+        explicit WeightedDefuzzifier(Type type = Automatic);
+        explicit WeightedDefuzzifier(const std::string& type);
+        virtual ~WeightedDefuzzifier() FL_IOVERRIDE;
+        FL_DEFAULT_COPY_AND_MOVE(WeightedDefuzzifier)
+
+        virtual void setType(Type type);
+        virtual Type getType() const;
+        virtual std::string getTypeName() const;
+        virtual Type inferType(const Term* term) const;
+        virtual bool isMonotonic(const Term* term) const;
+
+        virtual scalar tsukamoto(const Term* monotonic, scalar activationDegree,
+                scalar minimum, scalar maximum) const;
+
+    protected:
+        Type _type;
+
+    };
+
+}
+
+#endif  /* FL_WEIGHTEDDEFUZZIFIER_H */
+