What's the difference between a promise and a responsibility?

In the recent UK floods we heard a lot about defences failing and phrases being bandied about by engineers such as "a once in a hundred years" event and "could never have been envisaged." 

However when I hear this kind language it always makes me think of the difference between a promise, a responsibility and a guarantee.

Read What's the difference between a promise and a responsibility? 

Ken Thompson (aka The BumbleBee) blogs about bioteams, virtual collaboration and business simulation at www.bioteams.com

Follow @kenthompson