clarify what i mean by "policy"
diff --git a/doc/manual.asciidoc b/doc/manual.asciidoc
index f34b800..d9a6188 100644
--- a/doc/manual.asciidoc
+++ b/doc/manual.asciidoc
@@ -50,8 +50,14 @@
* very fast (i.e., instant) incremental builds, even for very large
projects.
-* very little policy about how code is built; "explicit is better than
- implicit".
+* very little policy about how code is built. Different projects and
+ higher-level build systems have different opinions about how code
+ should be built; for example, should built objects live alongside
+ the sources or should all build output go into a separate directory?
+ Is there an "package" rule that builds a distributable package of
+ the project? Sidestep these decisions by trying to allow either to
+ be implemented, rather than choosing, even if that results in
+ more verbosity.
* get dependencies correct, and in particular situations that are
difficult to get right with Makefiles (e.g. outputs need an implicit
