This is exactly why I think the AI pins are a good idea. The Humane pin seems too big/too expensive/not quite there yet, but for exactly what you're doing, I would like some type of brooch.
Wish I was good enough at holding thought, on my long thinking walks, sometimes even just a screen is enough to kill the thought I want to flesh out. Typically I just take a notepad but the pin thing would be better!
