"You'll never know unless you try, " was his response.

CNN: STORY HIGHLIGHTS

You never know until you try.

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But we're never going to know unless we try, are we?

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You will never know what can work better unless you try different things out.

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Try as they may, the investigators may never know what happened to a talented table-tennis player who proudly held his trophies in school pictures.

BBC: Profile: Tim Kretschmer

It is my prediction we will never know the whole story because it is not in the interest of JP Morgan Chase to try the case, but to pay as little as it has to in order to seal it up forever.

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They rely on intelligence that is never as good as they wish it to be, try to assess accurately actions of people they don't know well and do so with potentially devastating consequences for a wrong move.

CNN: Israeli politics in tailspin over Iran

And before I lose you to the videos, I want to point out that as a practicing clinical psychologist I try to be very careful not to toss around diagnostic labels, especially of people I have never met, and only know through reading a correspondence.

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