Two are true, one is not

Exercise and reference answers

Questions

1. False statement

   'Some S is not P' reverses safely

   Statements

   1. 'No S is P' reverses safely
   2. 'Some S is P' reverses safely
   3. 'Some S is not P' reverses safely

2. False statement

   O is the universal negative

   Statements

   1. O is the universal negative
   2. A is the universal affirmative
   3. O is the particular negative

3. False statement

   Induction guarantees a true conclusion

   Statements

   1. Deduction draws out what premises contain
   2. Induction guarantees a true conclusion
   3. Induction generalises beyond the evidence

Explanation