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68
CROOKED ANSWERS.
[Ch. III
  1.    
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      0 1  
       
  2.     0
       
      0 0  
        0
  3. No are . i.e.
       
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  4. Some are . i.e.
           
    1      
           
           
  5. All are . i.e.
       
      0 1
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[See pp. 48, 9]