His argument, though part of a possible number of factors in assessing potential moral status, becomes partial and misleading in isolation. 2 other (arguably more relevant) arguments I thought of provide a more complete picture: 1) "Perfectly equal weapons" (behavior assuming equal military power for every country or warring party) & 2) "Super imperfect weapons" (testing the willingness to cause greater collateral damage with increasingly imperfect weapons).
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https://www.youtube.com/watch?v=mNLDcC_JoBk