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mndcurrier mndcurrier
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6 years ago
If mercury is lighter than hydrogen, then mercury is the lightest element. From this it follows that if mercury is not the lightest element, then mercury is not lighter than hydrogen is
 
  A) modus ponens B) modus tollens C) contraposition D) disjunctive syllogism E) hypothetical syllogism
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thewizard06thewizard06
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6 years ago
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2 years ago
thanks
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