Assertion and reason

Exercise and reference answers

Questions

1. Reason

   The premises may allow other arrangements in which it fails.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   A single supporting diagram does not prove a conclusion.

2. Reason

   Every member of the inner class is also a member of the outer one.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Nested circles picture a universal affirmative.

3. Reason

   A circle represents a class of things.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   The size of a circle carries information.

Explanation