Update some ref docs.

docs/reference/mkref/Functor-Reference.md

@@ -15,31 +15,43 @@ See [and](#and).
 
 ## &&
 
-Basis Function Combinator
+Combinator
 
-nulco \[nullary \[false\]\] dip branch
+Short-circuiting Boolean AND
+
+Accept two quoted programs, run the first and expect a Boolean value, if
+it's `true` pop it and run the second program (which should also return a
+Boolean value) otherwise pop the second program (leaving `false` on the
+stack.)
+
+
+       [A] [B] &&
+    ---------------- true
+            B
+
+
+       [A] [B] &&
+    ---------------- false
+         false
 
-Gentzen diagram.
 
 ### Definition
 
-if not basis.
+    nulco [nullary [false]] dip branch
 
 ### Derivation
 
-if not basis.
-
-### Source
-
-if basis
+TODO: this is derived in one of the notebooks I think, look it up and
+link to it, or copy the content here.
 
 ### Discussion
 
-Lorem ipsum.
+This is seldom useful, I suspect, but this way you have it.
 
 ### Crosslinks
 
-Lorem ipsum.
+[||](#section-25)
+
 
 --------------
 
@@ -80,31 +92,30 @@ See [ne](#ne).
 
 ## !-
 
-Basis Function Combinator
+Function
 
-0 \>=
+Not negative.
+
+
+        n !-
+    ----------- n < 0
+       false
+
+
+       n !-
+    ---------- n >= 0
+       true
 
-Gentzen diagram.
 
 ### Definition
 
-if not basis.
-
-### Derivation
-
-if not basis.
-
-### Source
-
-if basis
+    0 \>=
 
 ### Discussion
 
-Lorem ipsum.
+Return a Boolean value indicating if a number is greater than or equal to
+zero.
 
-### Crosslinks
-
-Lorem ipsum.
 
 --------------
 
@@ -166,23 +177,17 @@ See [ne](#ne).
 
 ## \<{}
 
-Basis Function Combinator
+Function
 
-\[\] swap
 
-Gentzen diagram.
+       ... a \<{}
+    ----------------
+       ... [] a
+
 
 ### Definition
 
-if not basis.
-
-### Derivation
-
-if not basis.
-
-### Source
-
-if basis
+    \[\] swap
 
 ### Discussion