Experience is the conveyance by which we enter an image. Often it provides illumination and context as well. Frequently, however, it supplies neither and therein lies the adventure.
Two contradictory value theories could both be correct, even complementary, in the same sense that two planets, given similar physics, might occupy the same orbit.
If you start to draw, and know little of drawing, you might begin by roughing in the edges of the subject. If you start to draw, and know something of drawing, you might begin by roughing in the idea of the edges.