Earlier quoted context omitted.
> If you don't use a skill, that smo atrophies I don't think the _ability_ to memorize phone numbers is what atrophied here by getting a cell phone. The _need_ did. It's harder to memorize phone numbers today because we lack the practical application of the memory (e.g. only when something fails do we actually try to put that memory to practice). I bet anyone would quickly pick up on memorizing phone numbers if they…
The ability atrophied because it was not practiced because there was no need.
Of course, this is likely totally a regular memory device people would use. I've done no reading on this so, so if Socrates was wary of writing, was he also wary of pattern recognition or drawing as memory aids?