The suggestion for adding `Hashable1` and `Hashable2` came from prolonged discussions on the topic with Dan Doel. However, any errors in the implementation are my fault.

* [Dan Doel](mailto:dan.doel@gmail.com) [@dolio](https://github.com/dolio)

You can watch contributors carry on the quest for bragging rights in the [contributors graph](https://github.com/analytics/compensated/graphs/contributors).

Omission from this list is by no means an attempt to discount your contribution.

Thank you for all of your help!

-Edward Kmett