  Disagreement skepticism is also contingent. The nature and extent of disagreements are both contingent matters, so since disagreement skepticism relies on these factors, the skeptical consequences of disagreement are also contingent. At one point in time the shape of the Earth was quite contentious. While there is not now universal agreement that the Earth is roughly spherical, the recognition-of-controversy conditions are no longer met on this matter. Similarly, issues of great current controversy may too at some point fail to meet the recognition-of-controversy conditions. So, the skeptical threat from disagreement can come and go. That said, the track-record for the staying power of various philosophical disagreements strongly indicates that they aren’t going anywhere anytime soon.