Equally dangerous for curriculum workers is the opposite: indecision or lack of any philosophy, which can be reflected in attempts to avoid commitment to sets of values. A measure of positive conviction is essential to prudent action, even though total objectivity is not humanly possible. Having a personal philosophy that is tentative or subject to modification does not lead to lack of conviction or disorganized behavior. Curriculum workers can arrive at their conclusions on the best evidence available, and they can change when better evidence surfaces.