Note to Self: Whatever. Rhinos are plagued with ideas, impressions, and ramifications, all stimulating our brains and innards. We simply have too much going on, thinking-wise.
The “Note to Self” idea is endearing, but there are problems. Rhinos do not write. We have no place to store a note until We get around to it. We would be unlikely to ever read it, even if We could; We’d forget We’d writ it.
Or We could set aside a Significant Rock, thinking, “When We see that rock, analyze Gravitational Sincerity”. But what would actually happen would be, We’d see the rock and think, “Rock”. And press on.