MacSparky has a good article on why he returned to Notes.app. I use OmniOutliner for elaborate notes about my readings—per Cognitive Productivity book — and OmniGraffle to take graphical notes. With OmniPresence and iCloud, those ‘notes’ sync across devices.

It is quite problematic in my opinion to think of consciousness in binary or continuum terms, particularly with respect to the declaration on animal consciousness. There are actually many discontinuities in the space of possible brains/minds. This seems to be a hard concept to grasp as many people fall into the trap.…

30% is somewhat arbitrary. Feedback often should be elicited repeatedly throughout the product development lifecycle. The lean startup approach is more general: get feedback on a minimum viable product, learn, pivot or persevere, and iterate. (Compare Eric Ries' book).

Carthage is right that argumentation is a great way to develop comprehension. However, comprehension tends to be transient unless one uses it on a regular basis. In other words, lasting understanding requires practicing. The article discusses repetition, but the wrong kind of repetition. Re-reading is not that…