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The step of zooming out, being meta, and asking myself the right questions is hard. It is not the default action. The problem right in front of me always feels urgent, going meta never feels like the thing I should do right now, so I never do it.

- Pick a mobile app for interaction what would you change

We'll look back at social graphs and say that it is a mistake to use the social graph to approximate an interest graph. The people you now don't necessarily reflect your interests.

By 2050, there will be more than 2 billion people over the age of 60 in the world – about 25% of the world’s population. These numbers, combined with a massive increase in tech adoption by older adults, and a growing number of elderly-care providers, mean the Age Tech market is expected to reach $2 trillion.

Focus is not inconsistent with intellectual honesty. It does not mean ignoring feedback. It simply means that your bets are well selected and that your conviction to find a way to make something work is high enough to overcome the inevitable hurdles of building a company, product or investment portfolio.

When Facebook or Twitter intervenes in this process it gets very complex because platforms are meant to be neutral. Editorializing The Algorithm becomes a question of first amendment rights. This makes Section 230 the most complex and consequential legislation of our time.