Hello Chris,
Chris wrote:
 1. It is no use arguing with somebody whose mind is made up.

You are right about arguing.  Discussion with a open mind is the answer.
On the Irish List Norman and I butted heads over viruses if you remember.
Norman and I took the discussion off list and with several emails I realized
Norman was in my opinion correct in his hypothesis.  I returned to the IBL
list and said I now believed Dr. Carricks hypothesis was correct.  Norman
had sent me research & graphs he will show at Apimunda this year.
People & companies with agendas do not have a open mind to the other sides
points.
Bob