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law of transposition
References
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law of transposition

logic
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Learn about this topic in these articles:

  • Alfred North Whitehead
    formal logic
    / Logical manipulations in LPC

    …follow from these by the law of transposition; e.g., since (a) ⊃ (b) is valid, so is ∼(b) ⊃ ∼(a). The quantification of wffs containing three, four, etc., variables can be dealt with by the same rules.

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    …follow from these by the law of transposition; e.g., since (a) ⊃ (b) is valid, so is ∼(b) ⊃ ∼(a). The quantification of wffs containing three, four, etc., variables can be dealt with by the same rules.

    Read More