Self-study
Most successful entrepreneurs work at least 18 hours a day, and no one who works at least 18 hours a day has time for leisure activities. ███ ███ █████ █████████████ ████ ████ ███ ███████ ███████████
Summary
The stimulus can be diagrammed as follows:
Notable Valid Inferences
Most successful entrepreneurs are not happy.
Most successful entrepreneurs don’t have leisure time.
16.
If the statements above are █████ ████ ██ ███ █████████ █████ ██ ████ ███████
a
Anyone who has ██ ████ ███ ███████ ██████████ █████ ██ █████ ██ █████ █ ████
This could be true. From the diagram, we see “18+ hrs/day→ /leisure time.” (A) says /leisure time→ 18+ hrs/day. (A) confuses the sufficient and necessary conditions. It’s not a MBT, but it could be true.
b
Some entrepreneurs who ████ ██ █████ ██ █████ █ ███ ███ ███████████
This must be true. We already know that most successful entrepreneurs work 18+ hrs/day, so it is the case that some entrepreneurs who work 18+ hrs/day are successful.
c
Some happy entrepreneurs ███ ███████████
This could be true. We know that most successful entrepreneurs are not happy, but this does not mean that there is no overlap between entrepreneurs that are successful and those who are happy. “Most” doesn’t mean “all.”
d
Some entrepreneurs who ████ ██ █████ ██ █████ █ ███ ███ ██████
This must be false. We know that all people who work 18+ hrs/day are unhappy. This means that all entrepreneurs who work that much are unhappy. It must be false that someone in this group is happy.
e
Some successful entrepreneurs ████ ████ ████ ██ █████ █ ████
This could be true. We know that most successful entrepreneurs work 18+ hrs/day, but most doesn’t mean all. It could definitely be the case that some successful entrepreneurs work less than 18 hrs/day.