> >It matters if and when it makes a difference to us, not
> >otherwise.
> 
> When we think it makes a difference or when it actually
> does? (not necessarily the same thing)
> 
Of course not -- but how do we know?  :-)
Apart from generally keeping a weather eye
open -- which anything with 2 brain cells to
spark each other off would do in any case --
we can't do very much about that of which
we are unaware, can we?  (Not to dive
back into something I just climbed laboriously
out of, or anything...   :-)
Robin