Question 1090491
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<table border=1 cellpadding=3><tr><th>Number</th><th>Statement</th><th>Lines Used</th><th>Reason</th></tr><tr><td>1</td><td>~A &gt; (M &gt; A)</td><td></td><td></td></tr><tr><td>2</td><td>(Z &gt; M) &amp; (X = R)</td><td></td><td></td></tr><tr><td>3</td><td>~A</td><td></td><td></td></tr><tr><td>:.</td><td>~Z v I</td><td></td><td></td></tr><tr><td>4</td><td>M &gt; A</td><td>1,3</td><td>Modus Ponens</td></tr><tr><td>5</td><td>~M</td><td>4,3</td><td>Modus Tollens</td></tr><tr><td>6</td><td>Z &gt; M</td><td>2</td><td>Simplification</td></tr><tr><td>7</td><td>~Z</td><td>6,5</td><td>Modus Tollens</td></tr><tr><td>8</td><td>~Z v I</td><td>7</td><td>Addition</td></tr></table>
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