[Fairview]

I can't believe it took us so long to figure this out. How could we have been so stupid for so long? How much loss has been caused because we didn't realize this?

[ndt]

"I can't believe it took us so long to figure this out."

You might want to reign in the mia culpas, it's a hypothesis, nothing proved or even tested yet.

[Redbob]

"How could we have been so stupid for so long?"

The first guy to make a wheel probably said the same thing...