LSAT Practice Test

What can be inferred when Sierra goes for a walk if and only if Columbine goes for a walk?

1. They always go separately

2. They always go together

3. Either both go or neither go

4. They go on alternative days

The correct answer is: Either both go or neither go

When it is inferred that Sierra goes for a walk if and only if Columbine goes for a walk, option C, "Either both go or neither go," is the correct answer. This means that Sierra and Columbine always either both decide to go for a walk or both decide not to go for a walk. If one of them decides to go, the other one will also go, and similarly, if one of them decides not to go, the other one will also not go. This inference is based on the given condition that their actions are interdependent.