The thoughts about ideas and information are particularly relevant.

If you're not a domain expert everything you come up with will collapse under efficiency arguments. Such as "if this made sense someone would have done it".

Much of expertise is knowing what experts themselves think. That's why you can answer the question of why it isn't already there.

I have a question though. If you need to be a domain expert, how can there be so much focus on young founders? Is that a different category of investment, people who happen to have a lead into an emerging industry like social networks?