One of the key ingredients of creativty and innovation is the willingness to offer - as well as to accept - an alternate viewpoint, however ridiculous that alternate viewpoint appear at the time. Without this alternative viewpoint, we have nothing but the same old view which we are comfortable about.
To create and maintain a healthy atmosphere of debate, there must always be that courtesy and respect that one party bestows on the other party. Without that basic courtesy and respect, we shall reduce ourselves to nothing but hooligans who think that those who shout the loudest and have the strongest muscles will win the end; indeed, hooligans have won but there are some of us who may wish to contribute to society but engaging with each other at a more civil manner.
The purpose of debate is to arrive at the truth - whatever we may imagine truth to be.
Most of the time, we do not know the truth. So, we examine each other's arguments to make sure that we do not end up in circular argument - using logic to justify a prejudice.
It is easy to be inadvertently prejudiced but of the paradigm that we are caught - caught in The Matrix, so to speak.
We should therefore watch our thoughts and guard our mouths - lest we fall into the senselessness of a barking dog.
Of course, to aid debate, we may wish to point out errors in logic or unconscious prejudice that we find in other's arguments - from our own perspective. A criticism becomes constructive in this manner.
If there is no room for alternate views or arguments, then all that we are doing in blogs is nothing but reinforcing old prejudices. That is dangerous.