If the knot is kind of dark and has a blak ring arround it, it is a
loose knot and more likely it will come out, but if it is little dark
and has not ring arround it, it is most likely a tight knot and the
chance that it will come out is much less.
However if you pass several shalow pass on it, you will be much safer.

Even if it comes out, yoy still can glue it back.
Good luck
Maxen

news.tiscali.co.uk wrote:
Hi all

I'm going to put a rebate in a pine door (french doors/lap koint),
and am
curious to know whether routing over the centre of a knot would cause
a
problem.

I'm going to seal the knots first but am worried that the force of
the
router might knock it out?

Any help welcome.

Regards

Matt