diff --git a/docs/src/theories.md b/docs/src/theories.md
new file mode 100644
index 0000000..1e32035
--- /dev/null
+++ b/docs/src/theories.md
@@ -0,0 +1,10 @@
+# Theories
+
+Our general thought process for why we have implemented features the way we
+have.
+
+## Boards & Tags
+
+Boards are for overall themes and tags are for specification. An example of this
+is "Cars" and "Car Types". A board could be "Cars" and then some tags on a pin
+in that board would be "Mustang", "Sports Car", "Sudan", etc.
diff --git a/mkdocs.yml b/mkdocs.yml
index ead2ba5..4e026e6 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -16,6 +16,7 @@ nav:
   - Home: 'index.md'
   - Screenshots: 'screenshots.md'
   - Extensions: 'extensions.md'
+  - Theories: 'theories.md'
   - Docs: 'docs.md'
   - Assets: 'assets.md'
   - Contributing: 'contributing.md'