1. Flu vaccines are never completely effective.

Therefore, not every flu vaccine is completely effective.

2. Only diamonds are a girl's best friend.

Therefore, every diamond is a girl's best friend.

3. A child destined to succeed in life has high self-esteem.

Therefore, a child with low self-esteem is not destined to succeed in life.

4. If a date is a good dinner companion, then she does not spend every minute texting. Therefore, if a date does not spend every minute texting, then she is not a bad dinner companion.

5. There are banks that engage in money laundering.

Therefore, there are banks that do not engage in money laundering.

6. Not a single major storm fails to cause flight cancellations.

Therefore, every major storm causes flight cancellations.

7. Tax cuts never please everyone.

Therefore, every tax cut pleases everyone.

8. Military exercises are sometimes condemned by opponents.

Therefore, any military exercise is condemned by opponents.

9. It is false that not a single charter school is an academic underperformer.

Therefore, several charter schools are academic underperformers.

10. Fake artworks are sold on eBay.

Therefore, a few items sold on eBay are fake artworks.

Translate the premise and conclusion of the following immediate inferences into standard-form categorical propositions. Then use conversion, obversion, contraposition, or the traditional square of opposition to determine whether each is valid or invalid. For those that are invalid, name the fallacy committed.