The Italian Operative School opposes to philosophical "cognitive duplication" (postulating the presence of physical and non physical entities as preexisting 'realities') a constructivistic slant recognizing as paramount the function of man's mental processes. Such processes - the very building blocks of whatever we say and think - are analyzed and explained as moments of on/off attention. The author has researched the role of the dynamics of attention in the meaning of words, basing on his operative-constructivistic frame of reference this attempt to find a truly scientific semantics as the indispensable foundation of all knowledge.

---

Availability