Too vague

An issue was logged by "a user" at the following url:

https://alea.education/course-notes/ai-1#planact/section/framework/section/pop/section

## The issue as described by the user:
```
This isn't really defining anything.

In particular, it pops up as the definition for effect, but that is not defined.
```

## The text highlighted while reporting this issue:
```
A planning language
```

