college mathematics
posted by cody .
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
∼ x
∴∼ y
there is suppose to be a line between x and the bottom y.

you can draw no conclusion here.
knowing that x > y
tells you nothing about what ~x implies
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