6.5 (Adapted from (Barwise and Etchemendy, 1993).) Given the following, can you prove that the unicorn is

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6.5 (Adapted from (Barwise and Etchemendy, 1993).) Given the following, can you prove that the unicorn is mythical? How about magical? Horned?

* ' If the unicorn is mythical, then it is immortal, but if it is not mythical, then it is a mortal mammal. If the unicorn is either immortal or a mammal, then it is horned.

The unicorn is magical if it is horned.

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