Rather than linking to a page in another wiki, a wiki's owner may make a **twin** of it. (This is sometimes also called a **forked** page.)
You can see one by clicking here: Systems Thinking.
How do you know it's a twin? Because of this:
Twins
This shows that this page was originally a copy of the same-titled page from a different wiki. The color might hint that it's the same wiki as the one I used earlier, the one devoted to the Dayton Experiment. Hovering over it will confirm that.
Moreover, if you look down at the bottom-right of the browser window, you'll see that that wiki's dark blue box has been added (back) to the neighborhood.
The idea of twins is that:
* The author of this wiki read the original page, thought it relevant to readers of this wiki, so brought it in (and probably edited it to make it fit better into its new home).
* A reader who finds the twinned page interesting will probably also be interested in a lot of pages on that other wiki. So you can start exploring that other wiki in the same way you explore this one *without losing your place or context*. Try it: click on some links in the "System Thinking" page.
* Search results should be expanded to include the new wiki. Type "thinking" in the search bar at the bottom of the page to see what's now available to you.