Soybeans are almost entirely self pollinating; that is: by the time the bean flower blossoms and theoretically could be pollinated by a neighbor’s plant, it has already been pollinated by itself (the bean blossom contains both the stamen and the pistil). If a farmer’s bean crop bears any significant genetic similarity to a patented seed, it was grown from that seed and wasn’t the accidental result of cross pollination.
Then substitute corn, apples, watermelons or whatever you like into the comment.