I prefer to cook plant foods until they are soft enough to digest the fiber more easily. Meat on the other hand, I prefer as undercooked as is safe.
As for the acid alkaline theories. I'm not sure that I believe that it is as straight-forward as some sources make it seem. There are many traditional societies that consumed a lot of animal products without enough alkaline plant matter to balance it out. Yet these people did not have bone density loss or the diseases that we blame on being "too acidic."