An excellent introduction to logic (in all possible worlds), September 24, 2002, by Dr. Lee D. Carlson (Baltimore, Maryland USA) [Amazon.com] It is too bad this book is out of print, for the authors ...

Epistemic logic constitutes a rigorous framework for representing and reasoning about knowledge and belief. Central to this discipline is the formalisation of how agents acquire, retain and attribute ...

Aristotle's logic provides the foundation for the dialectical theory of change. The term contradiction is one we will return to in explaining dialectics, and also organisational science and systems ...