Market segmentation s a natural result of the vast differences among people

To me, error analysis is the sweet spot for improvement.

Only the most sophisticated of beings can lie and cheat, and get away with it.

We delude ourselves if we believe that skilled behavior is easy, that it can come about without effort. We forget the years of tuning, of learning and practice it takes to be skilled at even the most fundamental of human activities: eating, walking, talking, reading, and writing. It is tempting to want instant gratification - immediate expert performance and experiential pleasure - but the truth is that this primarily occurs only after considerable amounts of accretion and tuning.

Learning should take place when it is needed, when the learner is interested, not according to some arbitrary, fixed schedule

Technology usually provides a series of tradeoffs. Each asset is offset by a deficit...A major problem occurs when those who suffer from technology's defecits and those who benefit are not the same people.

I prefer design by experts - by people who know what they are doing