Tutorial for Booleans ends early

[rikedyp]

https://github.com/Dyalog/dyalog-jupyter-notebooks/blob/master/Boolean%20functions%20and%20boolean%20algebra.ipynb

TryAPL won't let you progress beyond a certain point part-way through the notebook.
I think it's due to the empty input field after "go ahead and explore on your own"

Seems to coincide with when TryAPL believes the notebook is "finished".
Run notebook on TryAPL