The study of Korean sword is the study and practice of inter-relating the elements: Energy (Ki), Sword ( Geom) and Body (Chae). This study is conducted in a variety of practices including exercises and drills, single person form, two-person form and validation cutting. Seen as a zero-sum circumstance, the excess of any one element can only mean a deficit concerning the other two elements. In each case, an activity is meant to instill in the swordsman a near-reflexive ability to assess a circumstance and execute the appropriate meld of these elements to produce the intended outcome. For this reason practitioners rely heavily on the use of cutting targets of various materials to demonstrate successful outcomes concerning any particular technique.