Taking permanent notes of our own thoughts is a form of self-testing as well: do they still make sense in writing? Are we even able to get the thought on paper? Do we have the references, facts and supporting sources at hand? And at the same time, writing it is the best way to get our thoughts in order.
Writing down our own thoughts is the same practice of testing knowledge. This test is whether or not it is a full fledged thought that you have enough understanding to put together.
