Doubt is healthy when it investigates instead of merely rejecting.

Doubt that goes and looks is a method. Doubt that simply declines is a posture, and it produces the same output regardless of what is put in front of it. The distinction matters because both use the same vocabulary and only one of them can ever be moved, which means only one of them is doing any work.

When you doubt something, ask what would settle it and then try to find out. If you cannot describe any finding that would change your position, you are not investigating. Naming that honestly is better than continuing to call it rigor.