The appearance of words alone does not identify ṭibāq. A positive and negative form of one verb can establish a contrast, and two entirely different words can express conceptually opposed states. The governing criterion is their meaning in context.
Repeating a word with no opposed sense does not itself make antithesis. In contrast, wakefulness — sleep is a clear opposition despite using distinct words.
Two unrelated ideas do not qualify simply because they occur together. When the contrast is figurative or conceptual rather than direct, the relevant axis of opposition must be explained.