Identify the difficulties in evaluating each of the claims given below. In each case, try to design ways of establishing that the claim is correct or incorrect.

1. Julia Roberts is a better actress than Michelle Pfeiffer.

2. Men are better drivers than women.

3. If a large number of people practice meditation in a community, it would reduce the crime rate.

4. Pimples are caused by immoral thoughts.

5. The number 13 is unlucky.

6. Child abuse is uncommon in Sri Lanka.