1. Given the following, can you prove the unicorn is mythical? How about Magi- cal? and Horned? (adapted from Barwise and Etchemendy (1993)). if the unicorn is mythical, then it is immortal, but if it...

Extracted text: 1. Given the following, can you prove the unicorn is mythical? How about Magi- cal? and Horned? (adapted from Barwise and Etchemendy (1993)). 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. 2. Which of the following are correct? (a) False E True (b) (A A B) E (A + B) (c) A + BEAVB (d) A + BE¬AV B (e) (A V B) ^ (¬A V B) is satisfiable