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Venn diagram is a kind of diagram to

  • A.represent and assess the validity of elementary inferences of syllogistic form.
  • B.represent but not assess the validity of elementary inferences of syllogistic form.
  • C.represent and assess the truth of elementary inferences of syllogistic form.
  • D.assess but not represent the truth of elementary inferences of syllogistic form.

Answer: A

A Venn diagram is a way of representing the classes of a syllogism by overlapping circles, and it is used both to represent a syllogistic form and to assess its validity: if shading the premises also shades or marks the conclusion, the form is valid. So the first option is right. A Venn diagram is about validity and not truth, because the truth of the premises depends on facts that no diagram can show, and so the options referring to the truth of inferences are wrong. The option that it represents but cannot assess validity is also wrong. The answer is that it represents and assesses the validity of elementary inferences of syllogistic form.

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