Suppose two wills concern Zayd: one seeks his movement, while the other seeks his stillness at the same time and in the same respect. If both are genuinely independent and effective, the problem of incompatibility arises.
Movement and rest contradict each other in this example only when the subject, time, and respect are identical. Walking in the morning and sitting in the evening is not contradictory; neither is one limb moving while another remains still.
Three conditions therefore structure the example: same subject, same time, same respect. Altering any of these conditions changes the premise and can dissolve the alleged conflict.