> > In other words, "use yer noddle" :-)
>
> Remind me which part of the anatomy that is, again?
I suspect it's like gumption.
"Any one who has gumption knows what it is, and any one who hasn't can
never know what it is. So there is no need of defining it." [1]
[1] eg
http://www.cs.cmu.edu/~rgs/ann-XXXVII.html
Mair