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Mathematics
Set Theory, Logic, Probability, Statistics
Logic and distributive laws
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[QUOTE="Stephen Tashi, post: 5461485, member: 186655"] They could have said "by distributive law used in reverse", but actually there is no "forward" and "reverse" direction to the distributive law. It a human tendency to think what we go from the left hand side of an equivalence to the right right hand side, but you don't have to use equivalences that way. Do you see how to go from the third line back to the second line using the distributive law? I think you tried to do more than apply the distributive law to the second step. [/QUOTE]
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Logic and distributive laws
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