3-1b Be flexible with the problem itself, because you may not know what’s the real problem yet
3-1c3d Problems should be well defined and should be actionable
3-1c2b Conjecturing the relative importance of such problems-projects is also essential
4-1a4b2a1 忘却を促進することで、人為的な古典化を起こす。
Inexplicit and unconscious ideas also evolve.