1. Some improvers of humankind are not exploiters of personal information. As a result, some corporate social networks are not improvers of humankind, seeing that all corporate social networks are exploiters of personal information.

2. Some drone attacks are assaults on human life, given that some stealth operations are assaults on human life and all drone attacks are stealth operations.

3. Some near-death experiences are supernatural phenomena, and no near-death experiences are easily forgotten happenings. Consequently some easily forgotten happenings are not supernatural phenomena.

Use the counterexample method to prove the following categorical syllogisms invalid. In doing so, follow the suggestions given in the text.