Current Version - Under Revision
A concept definition has one of the following two forms:
Note: A necessary condition is a characteristic that is always true of a
Example: |morphology| = |fracture| is a necessary condition of |fracture of femur|
Note: If all members of a sufficient set of conditions are true they imply that the concept is also true.
Example: |morphology| = |fracture| and |finding site| = |bone structure of femur| form a sufficient set of conditions that define the concept |fracture of femur|
Note: All members of the set of sufficient conditions are also necessary conditions. However, some necessary conditions may not form part of the sufficient set of conditions.
Consider the concept |gastric ulcer|