(a) Explain what it is for a pattern of reasoning to be sound.
(b) Consider the following argument forms:
In each of these cases, decide whether the pattern of reasoning is sound. [Hint: Represent each predicate by a set drawn on a Venn diagram constructed to reveal the argument form. Attempt to produce a Venn diagram where all the premises are true yet the conclusion is false. If this can be done, the argument form is unsound. Why? See Figure 17.19.]
For unsound patterns of reasoning, suggest an English example where the premises are true and the conclusion false.
[Example for (1)
No women are men TRUE
Some men are doctors TRUE
No women are doctors FALSE]
