I guess I wasn’t specifically trying to use 3 words but more just demonstrate that 10 decimal digits is about as simple as it gets in terms of clearly being able to communicate with that much precision over a low quality connection.
It seems to me that you're demonstrating that What3Words doesn't provide precise coordinates on the globe to 3 decimal places. This is not surprising, given that they don't intend to do that, they chop the globe up into squares and provide less precision with easier human readability.
