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.
Statements
Quantifiers / Conditionals (most, no, all)
Any time we have a mix of quantified claims and conditionals, we want to prioritize conditionals.
Happy → Time for entrepreneur Leisure
Work at → No time for least 18hrs Leisure
These both have the concept of "time for leisure", so we should see whether they chain together. If we contrapose either one, we can chain them together.
Happy → Time for → Work less than entrepreneur Leisure 18 hrs / day
Then we get our Most claim.
Most successful are Work at least entrepreneurs 18 hrs / day
The overlapping term is whether you work at least 18 hrs. We'll have to contrapose our chain so that it's starting from "Work at least 18".
Work at → No time for → Not happy least 18hrs Leisure entrepreneurs
Evaluate
So since we know that , we know the other two ideas on this chain as well:
Most successful entrepreneurs have not time for leisure. Most successful entrepreneurs are not happy.
Goal
The correct answer to Must Be False almost always either contradicts a conditional relationship we're given or contradicts an inference we can derive.
So we might see our inferences contradicted: - Most successful do have leisure time - Most successful are happy
Or we'll see our conditional chain contradicted: - Someone works at least 18, but is happy. (for example)