+>>>> Perhaps I misunderstood what `is_grand_mother` is supposed to do. The
+>>>> docs were not very clear to me. If it's supposed to be 2 down from
+>>>> the page, (and not from the root), this could be achieved by reversing
+>>>> the `depth_n` variables. So the page gets `depth_1` set, its parent gets
+>>>> `depth_2` set, etc. If you want to be able to include/exclude
+>>>> from both ends, you could also have a `height_n` that is 1 for the
+>>>> root, and counts upwards. --[[Joey]]
+