Philosophical Analysis: The Argument of Mutual Incompatibility (Burhan al-Tamanu‘)

Islamic theologians did not rely solely on textual evidence but also developed rigorous rational arguments to refute polytheism. One of the most powerful among them is the Argument of Mutual Incompatibility (Burhan al-Tamanu‘), derived from the Qur’an:

"Had there been within them [i.e., the heavens and earth] gods besides AllŒh, they both would have been ruined. So exalted is AllŒh, Lord of the Throne, above what they describe."

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(Surah Al-Anbiya: 22)

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This argument demonstrates that if multiple gods existed, contradictions would inevitably arise. For example, if one deity willed something to move while another willed it to remain still, three possibilities arise:

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Both wills occur simultaneously → impossible, as it leads to contradiction.

Neither occurs → both are powerless, and thus not divine.

Only one occurs → the one whose will prevails is the true God, while the other is powerless.

Philosophers like Ibn Rushd also addressed the hypothetical idea that multiple gods might always agree. Even then, this assumption fails because:

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Either their agreement is out of necessity → implying weakness and dependence.

Or it results in redundant action → which is irrational and meaningless.

As explained by scholars, any system involving shared control implies نقص (deficiency), since one who pauses to allow another to act is either compelled or incapable—both incompatible with true divinity.

Shintoism, with its concept of limited Kami that derive power from hierarchical relationships, collapses under this analysis. It leads to an unstable universe vulnerable to disorder, exposing the incoherence of polytheistic belief systems.

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