Stubs are an abstract concept, so in the second sentence, make it clearer somehow, like:
```
... pre-determined value. You can imagine them as a totally vanilla anonymous class with no attributes at all, except the one you assign to it.

For example, you could create a stub like `user_stub = stub(:name)`, which would just respond to `user_stub.name` without throwing a method_missing error, but wouldn't return anything 
```

Not sure if that's clearer - just an idea.