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GrayHimakar GrayHimakar
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6 years ago
Which one of the following conversions is invalid?
 
  a. No X is Y; No Y is X.
  b. Some X are Y; Some Y are X.
  c. All X are Y; only Y are X.
  d. All X are Y; all Y are X.
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berger58berger58
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6 years ago
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