Concept:
In the Mager or Bloom tradition, an "Instructional Objective" is a promise of what the student will be able to perform after the lesson. To be useful, it must be "Observable." If you cannot see it or test it, you cannot know if you succeeded in teaching.
Step 1: Characteristics of Good Objectives.
Objectives should be Simple (1) so everyone understands the goal, Measurable (2) so we can test the outcome, and Specific (4) so we know exactly what content was mastered.
Step 2: Identifying the Flaw.
An objective should NOT be Ambiguous (3). Vague words like "understand" or "know" are often avoided in favor of "identify," "draw," or "list," because ambiguity makes it impossible to conduct a fair assessment.