You say that Tao is Truth, and science also. But there can be only one truth, as truth is one by definition. If there is more than one truth, then the term "truth" loses its meaning. Perhaps you mean that science and the Tao together constitute a single truth? Then is the Tao half the truth, and science the other half? Yet the Tao is precisely that which does not come by degrees. Either it is the full truth, or not at all. Choose!
How I despise your "also". That despicable little word is the most used word in every scholar's vocabulary. Either/or is an alien concept to scholars, who live for, and are nourished by the category - categories that blur boundaries! Their lives are devoted to the task of keeping a maximum number of categories afloat simultaneously. They are like the clown who tries to balance dozens of spinning plates on sticks, and always comes to grief in the end. They have made the scientific method into a God, and left reason far behind.