In the case of the “draw problem,” the draw in the cabinet is a whole
system and the only guide of the draw is an element related to our
conflict. The surface of the guide in contact with the cabinet’s
support is zone with conflicting physical requirements: it should be slippery and should not be slippery (like original wood surface). So
physical contradiction in this case looks like: “The surface of the draw guide should have low friction for good sliding and should not have low friction for original wood surface (because we want to keep it without changes.).