Acceptance of many forms of Steampunk. Being open-minded and/or inclusive to the variations steampunk comes in.
Western Steampunk, Victorian steampunk, Edwardian steampunk, Steamfunk, WWI steampunk, and Eastern steampunk being welcomed at a convention are all examples of this.
Saying to someone, "that's not steampunk because it isn't brown, has no gears, (or whatever else you can think of)" is NOT cog acceptance.