diff --git a/core/src/lib.rs b/core/src/lib.rs
index 04891f19..a2f54d67 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -55,6 +55,7 @@ mod value_type_set;
 mod sql_types;
 
 pub use types::{
+    Cloned,
     Entid,
     FromRc,
     KnownEntid,
diff --git a/core/src/types.rs b/core/src/types.rs
index c7ea58df..da49d7f6 100644
--- a/core/src/types.rs
+++ b/core/src/types.rs
@@ -72,6 +72,23 @@ impl<T> FromRc<T> for Arc<T> where T: Sized + Clone {
     }
 }
 
+// We do this a lot for errors.
+pub trait Cloned<T> {
+    fn cloned(&self) -> T;
+}
+
+impl<T: Clone> Cloned<T> for Rc<T> where T: Sized + Clone {
+    fn cloned(&self) -> T {
+        (*self.as_ref()).clone()
+    }
+}
+
+impl<T: Clone> Cloned<T> for Arc<T> where T: Sized + Clone {
+    fn cloned(&self) -> T {
+        (*self.as_ref()).clone()
+    }
+}
+
 //
 // Use Rc for values.
 //
diff --git a/query-algebrizer/src/clauses/mod.rs b/query-algebrizer/src/clauses/mod.rs
index 1903a62b..7ee8b136 100644
--- a/query-algebrizer/src/clauses/mod.rs
+++ b/query-algebrizer/src/clauses/mod.rs
@@ -25,12 +25,9 @@ use std::fmt::{
     Formatter,
 };
 
-use std::ops::{
-    Deref,
-};
-
 use mentat_core::{
     Attribute,
+    Cloned,
     Entid,
     HasSchema,
     KnownEntid,
@@ -100,17 +97,6 @@ pub use self::inputs::QueryInputs;
 
 use Known;
 
-// We do this a lot for errors.
-trait Cloned<T> {
-    fn cloned(&self) -> T;
-}
-
-impl<T: Clone> Cloned<T> for ::mentat_core::ValueRc<T> {
-    fn cloned(&self) -> T {
-        self.deref().clone()
-    }
-}
-
 trait Contains<K, T> {
     fn when_contains<F: FnOnce() -> T>(&self, k: &K, f: F) -> Option<T>;
 }
diff --git a/query-algebrizer/src/clauses/pattern.rs b/query-algebrizer/src/clauses/pattern.rs
index 62aede94..05b08c24 100644
--- a/query-algebrizer/src/clauses/pattern.rs
+++ b/query-algebrizer/src/clauses/pattern.rs
@@ -9,6 +9,7 @@
 // specific language governing permissions and limitations under the License.
 
 use mentat_core::{
+    Cloned,
     Entid,
     HasSchema,
     TypedValue,
@@ -24,8 +25,6 @@ use mentat_query::{
     Variable,
 };
 
-use super::Cloned;
-
 use clauses::{
     ConjoiningClauses,
 };