The arguer may be right about…, but he seems to neglect to mention the fact that…
Contrary to generally accepted views, I argue that…
It is true that…, but this is not to say that…
The main/obvious problem with this argument is that it is blind to the basic fact that…
It would be natural/reasonable to think that…, but it would be absurd to claim that…
There is absolutely no reason for us to believe that…
At first thought, it may seem an attractive idea, but on second thought, we find that…
The problem/fact is that…
As far as I am concerned, I believe that…
Those who object to…argue that…But people who favor…, on the other hand, argue that…
