Prolonged Good News?

I was reading an interview with Paul Krugman recently, and there were couple of sentences that reminded me that seems to be another version of the so-called "positive feedback loops":

... prolonged good news tends to silence the skeptics ...

This sentence also is key, especially in the context of what attempts were made during heights of the Internet bubble:

Those who rationalized the way things were going gained credibility until the day things fell apart.

No intentions at all? Only hope gets so visible reinforced by positive feedback loops ...

Happy New Year!