The first thing I look at is, 'Is the entrepreneur going after really big problems, to the extent that it feels scary when they talk about it?' You wonder if the idea is possible. I have seen that a lot of times, people go after small problems, and that's a sign that they are not confident.

At Amazon, we were not working with the e-commerce division but with the Web services team. We started Flipkart completely from scrap. Moreover, the whole shopping behaviour and infrastructure challenges in the Indian market were different from that in the U.S. and European markets.

Valuation depends on several factors. From an investor angle, they look at leadership position, management, and what the company's offerings are. I think these three things got 5/5 for a company like Flipkart, and that is what is driving valuations and growth.

Believe it or not, I'm a bit clumsy with technology. It's probably why I'm so excited about the touchscreen - even an idiot can use it!

Nature - how, we don't know - has technology that works in every living cell and that depends on every atom being precisely in the right spot. Enzymes are precise down to the last atom. They're molecules. You put the last atom in, and it's done. Nature does things with molecular perfection.

The field of AI has traditionally been focused on computational intelligence, not on social or emotional intelligence. Yet being deficient in emotional intelligence (EQ) can be a great disadvantage in society.

One of the problems of modern society, or the post-Internet age, is that there are so many things bombarding us that we could care about. I think it's more important than ever to really get clear and focus on what's worth caring about and what's just noise or distraction.