diff --git a/Overview-of-uBlock's-network-filtering-engine:-details.md b/Overview-of-uBlock's-network-filtering-engine:-details.md
index 91afbfb..f60e303 100644
--- a/Overview-of-uBlock's-network-filtering-engine:-details.md
+++ b/Overview-of-uBlock's-network-filtering-engine:-details.md
@@ -37,4 +37,10 @@ Advantages:
 
 Disadvantages:
 - High overhead creating/deleting network/cosmetic filters (high memory churn).
+   - Related: [Memory footprint: what happens inside uBlock after installation](./Memory-footprint:-what-happens-inside-uBlock-after-installation)
 - In case of 3rd-party filter lists, forced to use all filters, including those which may not be wanted.
+
+#### Why are rules "dynamic" and filters "static" if both are declarative?
+"Static" means it must be "compiled" ahead-of-time before being used, and "dynamic" means it can effortlessly change at runtime:
+- Rules: you can set rules with a simple mouse clicks in the user interface, they are virtually zero overhead to create/remove.
+- Filters: all filters must be all reloaded in memory when adding/removing.
\ No newline at end of file