I recall an encounter once where my boss was running through a proposal with his boss. His boss then said, "So?" After providing a response, he was again asked, "So?" And this went on for five more times. It wasn't asked in a malicious way. It was a matter of fact, trying to dig deeper into the subject. Finally, having dug in five levels deep, he then went on to analyse the issue strategically. Fascinating to say the least.
Sometime back, I came across an analyst report about a stock. It said that the cash and equivalent that a company had was greater than the market value of the company (i.e. number of shares x price of the shares). And so it came up with a target price for the company. I bought into the idea.
I should have asked "So?" a few more times.
Lesson learnt: It's the business that matters.