Tutorial Contents Tutorial Two: Propositional Calculus: Language - Truth Functors - The Propositional
Language
- "Implicate" -
Stand-alone sentences - Scope
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Exercise 2.4

 

1

In each of the following, say whether the second sentence is an acceptable translation of the first. (If it isn't, think of situation in which the sentences would have different truth-values.)
  (i) Mary and Jane are women. [Mary is a woman Jane is a woman].
  (ii) Mary and Jane are friends. [Mary is a friend Jane is a friend].
  (iii) Mary went to visit Jane, who lives next door. [Mary went to visit Jane Jane lives next door].
  (iv) Mary went to visit someone who lives next door. [Mary went to visit someone someone lives next door].
  (v) Mary and John got married and had three children. [Mary and John got married Mary and John had three children].
  (vi) Dumbo is a grey elephant. [Dumbo is an elephant Dumbo is grey].
  (vii) Dumbo is a small elephant. [Dumbo is small Dumbo is an elephant].
  (viii) Dumbo is an elephant, but quite intelligent. [Dumbo is an elephant Dumbo is quite intelligent].
  (ix) Dumbo is a skilful flier. [Dumbo is skilful Dumbo is a flier].
 
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