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college mathematics

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In Exercises 13–32, determine whether the argument is valid or invalid. You may compare the argument to a standard form, given on page 155, or use a truth table.

∼ x
∴∼ y
there is suppose to be a line between x and the bottom y.

  • college mathematics -

    you can draw no conclusion here.

    knowing that x --> y
    tells you nothing about what ~x implies

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