3 files changed, 16 insertions, 0 deletions
diff --git a/docs/content/error/ng/areq.ngdoc b/docs/content/error/ng/areq.ngdoc
index ade8a5ba..fbc45d8a 100644
--- a/docs/content/error/ng/areq.ngdoc
+++ b/docs/content/error/ng/areq.ngdoc
@@ -2,3 +2,7 @@
 @name ng:areq
 @fullName Bad Argument
 @description
+
+AngularJS often asserts that certain values will be present and truthy using a
+helper function. If the assertion fails, this error is thrown. To fix this problem,
+make sure that the value the assertion expects is defined and truthy.
+\ No newline at end of file
diff --git a/docs/content/error/ng/cpi.ngdoc b/docs/content/error/ng/cpi.ngdoc
index 95b30024..5d41ee64 100644
--- a/docs/content/error/ng/cpi.ngdoc
+++ b/docs/content/error/ng/cpi.ngdoc
@@ -2,3 +2,9 @@
 @name ng:cpi
 @fullName Bad Copy
 @description
+
+This error occurs when attempting to copy an object to itself. Calling {@link
+api/angular.copy angular.copy} with a `destination` object deletes
+all of the elements or properties on `destination` before copying to it. Copying
+an object to itself is not supported. Make sure to check your calls to
+`angular.copy` and avoid copying objects or arrays to themselves.
+\ No newline at end of file
diff --git a/docs/content/error/ng/cpws.ngdoc b/docs/content/error/ng/cpws.ngdoc
index 2f7a9c5b..59b9ffac 100644
--- a/docs/content/error/ng/cpws.ngdoc
+++ b/docs/content/error/ng/cpws.ngdoc
@@ -2,3 +2,9 @@
 @name ng:cpws
 @fullName Copying Window or Scope
 @description
+
+Copying Window or Scope instances is not supported because of cyclical and self
+references. Avoid copying windows and scopes, as well as any other cyclical or
+self-referential structures. Note that trying to deep copy an object containing
+cyclical references that is neither a window nor a scope will cause infinite
+recursion and a stack overflow.
+\ No newline at end of file