Type IIs don't have enough effect from their insulin due to resistance or eventual beta cell destruction to get their fasting blood sugar down to a good level. They DO have the ability to manage the fasting margin, so if they can get help from basal to bring the baseline down they can regulate up or down within that margin. In other words, a type II with appropriate basal who is at 170 will eventually come down to their set point, wherever it was titrated to. Are you saying that insulin resistance is not a lack of insulin sensitivity? Ex. Losing fat weight increases insulin sensitivity, and gaining it lowers sensitivity. Exposure to large amounts of insulin causes a decrease in insulin sensitivity ie insulin resistance. I may be using that term in more of a sports medicine context, but insulin resistance is basically equivalent to a lack of insulin sensitivity in that context.