I think this discussion points us to a fundamental truth regarding the nature of conservatism.
Conservatism and Liberalism, if we are to break them down in reference to their function as historical indicators, are little more than terms dealing with one's relationship with the status quo.
If we look back at most of the great thinkers in human history, we notice that during their own time they were considered liberals. This is not to say that the ideological positions authored by historical actors will remain liberal as time passes, but instead it shows that actors are judged on a context based of reality in terms of time and location, i.e. what we know and when/how we know it.
In other words a conservative is, by nature, a defender of the status quo and all of its complexities. Given the fact that society has a natural tendency to progress, a fact that is recognized by all in some form or another, it becomes difficult for a conservative to balance a preference for the status quo with the knowledge that his or her position will be looked upon differently by proceeding generations. What this means is that we can look to the position of the conservative in our present time and location and acknowledge that at some point in the future this position will generally be accepted as false, and the position of today's liberal will become a conservative principle.
How this manifests itself in terms of a conservative ideology is truly an amazing human phenomenon, because conservatism allows us to see exactly how comfortable the human mind can be with contradiction or paradox. A conservative, whether implicitly or explicitly, acknowledges that the world is changing, that the 'truth' of today is being challenged by the forces that shape tomorrow, and this reality is an uncomfortable one. For this reason the conservative must acknowledge, in some function, that there are no precise ways to project a world view that is consistent with the past on a society that is constantly changing, and for this reason the conservative makes no serious attempt to describe his or her ideal society in pragmatic, systematic ways. The conservative chooses to default to rhetorical constructions, or political narratives, that are dependent on hypothetical situations instead of real world examples.
This is where we can see the function of contradiction in terms of conservative ideology. Because the conservative must default to a position that does not exist today, but instead is the product of a nostalgic remembrance of the past, the conservative must conceive of reality as a futuristic, quasi-utopic place that allows the incompatibility of their ideology to function correctly in a world that does not operate within these boundaries.
The conservative is comfortable with contradiction because he or she must implicitly acknowledge that the world cannot function as he or she would like, while explicitly arguing on behalf of his or her ideology anyway.