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===Commentary Note 12.3===
 
===Commentary Note 12.3===
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Peirce next considers a pair of compound involutions, stating an equation between them that is roughly analogous to an associative law:
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Peirce next considers a pair of compound involutions, stating an equation between them that is analogous to one of the usual laws of exponents in ordinary arithmetic, namely, <math>(a^b)^c = a^{bc}.\!</math>
    
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