>> << Ndx Usr Pri Phr Dic Rel Voc !: wd Help Primer

# Checkpoint E

At this point you should understand:

- the terms atom, list, table, array, axis, rank, shape, item, frame, and cell
- noun rank
- verb rank
- `"` (rank conjunction)
- agreement
- how rank determines which cell arguments a verb applies to
- how the result is built up of the partial results

Check your understanding by doing the following exercises:

- experiment with the primitives you know and use `"` to apply them to cells and see how the partial results build up the final result
- don't limit your experiments to verbs like `+`, but also try verbs such as `$` (shape) and `,` (append)

>> << Ndx Usr Pri Phr Dic Rel Voc !: wd Help Primer