diff --git a/README.md b/README.md
index 0e7c467..311f84a 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ working across different projects via [VisualMode](https://www.visualmode.dev/).
 
 For a steady stream of TILs, [sign up for my newsletter](https://visualmode.kit.com/newsletter).
 
-_1825 TILs and counting..._
+_1826 TILs and counting..._
 
 See some of the other learning resources I work on:
 
@@ -1104,6 +1104,7 @@ If you've learned something here, support my efforts writing daily TILs by
 - [Sort Normalized Version Of Data](python/sort-normalized-version-of-data.md)
 - [Start The Debugger When A Test Errors](python/start-the-debugger-when-a-test-errors.md)
 - [Store And Access Immutable Data In A Tuple](python/store-and-access-immutable-data-in-a-tuple.md)
+- [Strictly Separate Positional And Keyword Arguments](python/strictly-separate-positional-and-keyword-arguments.md)
 - [Test A Function With Pytest](python/test-a-function-with-pytest.md)
 - [Turn Method Into Cached Property On Class Instance](python/turn-method-into-cached-property-on-class-instance.md)
 - [Use pipx To Install End User Apps](python/use-pipx-to-install-end-user-apps.md)
diff --git a/python/strictly-separate-positional-and-keyword-arguments.md b/python/strictly-separate-positional-and-keyword-arguments.md
new file mode 100644
index 0000000..aca98d3
--- /dev/null
+++ b/python/strictly-separate-positional-and-keyword-arguments.md
@@ -0,0 +1,52 @@
+# Strictly Separate Positional And Keyword Arguments
+
+Typically when I define a function with arguments in Python, I can choose pass
+the arguments to that function as positional or keyword arguments. I can even
+mix and match as long as all positional arguments come before all keyword
+arguments.
+
+But what if I want to enforce a strict boundary between what arguments are
+positional and what arguments are keyword?
+
+By combining the _positional-only marker_ (`/`) and _keyword-only marker_ (`*`),
+I can get exactly that effect.
+
+Here I have defined a `connect` function that takes `host` and `port` arguments.
+Because both appear before the `/` marker, they must be passed as positional. I
+also have a `timeout` argument with a default. Because `timeout` comes after the
+`*` marker, it must be passed as a keyword argument.
+
+```python
+def connect(host, port, /, *, timeout=30):
+    print(f"Connecting to #{host}:#{port}")
+    print(f"  Timeout: {timeout}s")
+
+    # ...
+```
+
+Let's see it in action.
+
+```python
+>>> connect("localhost", 3000, timeout=20)
+Connecting to #localhost:#3000
+  Timeout: 20s
+
+>>> connect(host="localhost", port=4000)
+Traceback (most recent call last):
+  File "/Users/lastword/dev/misc/python-experiments/arguments.py", line 37, in <module>
+    connect(host="localhost", port=4000)
+TypeError: connect() got some positional-only arguments passed as keyword arguments: 'host, port'
+```
+
+This second attempt of calling `connect` with `host` and `port` as keyword
+arguments presents as a runtime `TypeError` because they were expected as
+"positional-only arguments".
+
+In my editor that line also presents with two static typing errors `call-arg:
+Unexpected keyword argument "port" for "connect"` (and the equivalent for
+`host`).
+
+Note: I did some additional reading just now in [Python in a Nutshell, 4th
+Edition](https://www.oreilly.com/library/view/python-in-a/9781098113544/) and I
+see that it is more appropriate to call them _Named Arguments_ instead of
+_Keyword Arguments_.