Given that all farmers who irrigate daily are successful, and no farmer who irrigates weekly is successful, what can be concluded about Sam if he irrigates daily?

• A. Sam is successful
• B. Sam is not successful
• C. Sam's status is unknown
• D. Sam irrigates weekly

Answer: (A)

When a rule says that every person who does something daily has a certain outcome, any individual who does that daily action falls into that outcome. Sam irrigates daily, so he belongs to the group of daily irrigators, who are all successful. Therefore, Sam must be successful. The detail about weekly irrigation doesn’t change this for Sam, since his action is daily, not weekly.