My take on fair chase is that the deer aren't hampered by something man made if they are trying to flee. Deer can jump a barbed wire fence, stone wall or cross a road. They can't jump over or go under a high fence designed to keep them in. Enclose several thousand acres in a high fence is different than creating a 40 acre penned area to confine deer. I personally won't hunt behind a high fence but to those that are on a vast Texas ranch I don't really have a problem. Fair chase is also a personal thing. Some people, for instance, won't shoot a grouse on the ground, ducks not deeking into decoys, rabbits not in front of a dog etc. We all have personal morals and ethics as well as a feeling about what is fair. When the doc said "to thine own self be true" is fitting. We all set our own standards.