readme

frenchy64 · Oct 6, 2012 · caa693f · caa693f
1 parent 96b9560
commit caa693f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/README.md b/README.md
@@ -94,8 +94,8 @@ positive propositions.
 ```
 
 Positive information infers just fine, like `(filter number? coll)`.
-The above idiom is useful when you have a type like `(U nil x)` and there is no
-predicate to test for `x`.
+The above idiom is useful when you are filtering something like a `(Seqable (U nil x))` and there is no
+predicate to test for `x`, so you can only test if something isn't `nil`.
 
 # Usage