GMAT考试写作指导：Argument范文四八
<p> 22. <span word="The">The</span> <span word="conclusion">conclusion</span> <span word="in">in</span> <span word="this">this</span> <span word="argument">argument</span> <span word="is">is</span> <span word="that">that</span> <span word="increased">increased</span> <span word="vigilance">vigilance</span> <span word="by">by</span> <span word="drug">drug</span> <span word="enforcement">enforcement</span></p><p> <span word="authorities">authorities</span> <span word="has">has</span> <span word="resulted">resulted</span> <span word="in">in</span> <span word="an">an</span> <span word="increase">increase</span> <span word="in">in</span> <span word="the">the</span> <span word="illegal">illegal</span> <span word="use">use</span> <span word="of">of</span> <span word="cocaine">cocaine</span>. <span word="The">The</span> <span word="author">author</span> <span word="reaches">reaches</span></p><p> <span word="this">this</span> <span word="conclusion">conclusion</span> <span word="on">on</span> <span word="the">the</span> <span word="grounds">grounds</span> <span word="that">that</span> <span word="drug">drug</span> <span word="traffickers">traffickers</span> <span word="have">have</span> <span word="responded">responded</span> <span word="to">to</span> <span word="increased">increased</span></p><p> <span word="enforcement">enforcement</span> <span word="efforts">efforts</span> <span word="by">by</span> <span word="switching">switching</span> <span word="from">from</span> <span word="bulkier">bulkier</span> <span word="and">and</span> <span word="riskier">riskier</span> <span word="drugs">drugs</span> <span word="to">to</span> <span word="cocaine">cocaine</span>. <span word="Presumably">Presumably</span>,</p><p> <span word="the">the</span> <span word="authors">authors</span> <span word="reasoning">reasoning</span> <span word="is">is</span> <span word="that">that</span> <span word="the">the</span> <span word="increased">increased</span> <span word="enforcement">enforcement</span> <span word="efforts">efforts</span> <span word="inadvertently">inadvertently</span> <span word="brought">brought</span></p><p> <span word="about">about</span> <span word="an">an</span> <span word="increase">increase</span> <span word="in">in</span> <span word="the">the</span> <span word="supply">supply</span> <span word="of">of</span> <span word="cocaine">cocaine</span> <span word="which">which</span>, <span word="in">in</span> <span word="turn">turn</span>, <span word="brought">brought</span> <span word="about">about</span> <span word="the">the</span> <span word="observed">observed</span></p><p> <span word="increase">increase</span> <span word="in">in</span> <span word="the">the</span> <span word="illegal">illegal</span> <span word="use">use</span> <span word="of">of</span> <span word="cocaine">cocaine</span>. <span word="This">This</span> <span word="line">line</span> <span word="of">of</span> <span word="reasoning">reasoning</span> <span word="is">is</span> <span word="problematic">problematic</span> <span word="in">in</span> <span word="two">two</span></p><p> <span word="important">important</span> <span word="respects">respects</span>.</p><p> <span word="In">In</span> <span word="the">the</span> <span word="first">first</span> <span word="place">place</span>, <span word="the">the</span> <span word="author">author</span> <span word="has">has</span> <span word="engaged">engaged</span> <span word="in">in</span> <span word="after">after</span> <span word="this">this</span>, <span word="therefore">therefore</span> <span word="because">because</span> <span word="of">of</span> <span word="this">this</span></p><p> <span word="reasoning">reasoning</span>. <span word="The">The</span> <span word="only">only</span> <span word="reason">reason</span> <span word="offered">offered</span> <span word="for">for</span> <span word="believing">believing</span> <span word="that">that</span> <span word="the">the</span> <span word="increased">increased</span> <span word="vigilance">vigilance</span> <span word="caused">caused</span> <span word="the">the</span></p><p> <span word="increase">increase</span> <span word="in">in</span> <span word="cocaine">cocaine</span> <span word="use">use</span> <span word="is">is</span> <span word="the">the</span> <span word="fact">fact</span> <span word="that">that</span> <span word="the">the</span> <span word="former">former</span> <span word="preceded">preceded</span> <span word="the">the</span> <span word="latter">latter</span>. <span word="No">No</span> <span word="additional">additional</span></p><p> <span word="evidence">evidence</span> <span word="linking">linking</span> <span word="the">the</span> <span word="two">two</span> <span word="events">events</span> <span word="is">is</span> <span word="offered">offered</span> <span word="in">in</span> <span word="the">the</span> <span word="argument">argument</span>, <span word="thus">thus</span> <span word="leaving">leaving</span> <span word="open">open</span> <span word="the">the</span></p><p> <span word="possibility">possibility</span> <span word="that">that</span> <span word="the">the</span> <span word="two">two</span> <span word="events">events</span> <span word="are">are</span> <span word="not">not</span> <span word="causally">causally</span> <span word="related">related</span> <span word="but">but</span> <span word="merely">merely</span> <span word="correlated">correlated</span>. <span word="This">This</span> <span word="in">in</span> <span word="turn">turn</span></p><p> <span word="leaves">leaves</span> <span word="open">open</span> <span word="the">the</span> <span word="possibility">possibility</span> <span word="that">that</span> <span word="factors">factors</span> <span word="other">other</span> <span word="than">than</span> <span word="the">the</span> <span word="one">one</span> <span word="cited">cited</span> <span word="are">are</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="the">the</span></p><p> <span word="increase">increase</span> <span word="in">in</span> <span word="cocaine">cocaine</span> <span word="use">use</span>.</p><p> <span word="In">In</span> <span word="the">the</span> <span word="second">second</span> <span word="place">place</span>, <span word="the">the</span> <span word="author">author</span> <span word="assumes">assumes</span> <span word="that">that</span> <span word="an">an</span> <span word="increase">increase</span> <span word="in">in</span> <span word="the">the</span> <span word="supply">supply</span> <span word="of">of</span> <span word="cocaine">cocaine</span> <span word="is">is</span></p>
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