RE: Share Price19 Jul 2020 22:20
"The demise of Space Shuttle Columbia over Texas on February 1'st 2003, was the result of a hole in one of its wings that filled with hot gas, a hole that had been caused by a piece of insulating foam that fell off the fuel tank. But five days later, NASA still didn't think that the foam was to blame—it simply couldn't be, was the thinking." [original idea by Paul Wiltshire, MD at CityIQ]
- Everyone knew that foam had fallen from the shuttle...so there were 'known knowns'
- Some engineers thought the foam could have seriously damaged the shuttle...so they had ' known unknowns'. They knew there could be damage but they weren't certain. They kept silent
- NASA management knew nothing about the potential damage...so they had 'unknown unknowns'
At no point were there any 'unknown knowns' (it is a silly concept). The problem was made catastrophic when engineers didn't try to resolve their 'known unknowns' by asking NASA management to look for damage. Simples!