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Write the argument using propositional wffs (use the statement letters shown). Then, using propositional logic, including the rules in Table 1.14 (Mathematical Structures for Computer

Write the argument using propositional wffs (use the statement letters shown). Then, using propositional logic, including the rules in Table 1.14 (Mathematical Structures for Computer Science 7th Edition), prove that the argument is valid:

50). It is not the case that if electric rates go up, then usage will go down, nor is it true that either new power plants will be built or bills will not be late. Therefore, usage will not go down and bills will be late. R, U, P, B.

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