"AWAI by Ryoichi Nakamura

A pen that produces faint, smudged lines, encouraging ambiguity and reflection rather than bold certainty."

This reminds me of the visual design choice in the Grady booch object-oriented design methodology.

During analysis, object classes looked like vaguely circular clouds. During design, classes had square boxes.

He explained that analysis is vague and fuzzy and you shouldn't try to be precise and crisp because that's the stage about which you're dealing with the real world and you know less than you think.

He found it sad that people started producing templates for the object clouds so that they would be precisely unboxed.

https://en.wikipedia.org/wiki/Grady_Booch#/media/File%3ABooc...