So, as I say, how useful this indicator can be is something for you to decide.

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"You can say, 'I have the opportunity now to move on to something I find more fulfilling, '" she suggests.

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If you're a pioneer and you come up with something that can change the world and you turn round and say 'I'm not going to share this idea with anyone' then you only impact the few and not the many.

CNN: Quotes of the day: Cameron Sinclair