Two are true, one is not

Exercise and reference answers

Questions

1. False statement

   Nested circles mean No S is P

   Statements

   1. Nested circles mean All S is P
   2. Separate circles mean No S is P
   3. Nested circles mean No S is P

2. False statement

   Overlap means all members are shared

   Statements

   1. Overlap means all members are shared
   2. Overlap means some members are shared
   3. No overlap means none are shared

3. False statement

   One favourable diagram proves a conclusion

   Statements

   1. A diagram can show nothing follows
   2. One favourable diagram proves a conclusion
   3. Every consistent diagram must support a valid conclusion

Explanation