diff -r e7920e205785 -r 5df5258332d1 src/instance.rs
--- a/src/instance.rs	Tue Sep 02 15:18:30 2025 -0500
+++ b/src/instance.rs	Wed Sep 03 08:40:17 2025 -0500
@@ -215,14 +215,14 @@
         Self: 'b;
 
     /// Returns an owned instance of `X`, cloning or converting non-true instances when necessary.
-    fn own(self) -> D::OwnedInstance;
+    fn own(self) -> X;
 
     // ************** automatically implemented methods below from here **************
 
     /// Returns an owned instance or reference to `X`, converting non-true instances when necessary.
     ///
     /// Default implementation uses [`Self::own`]. Consumes the input.
-    fn cow<'b>(self) -> MyCow<'b, D::OwnedInstance>
+    fn cow<'b>(self) -> MyCow<'b, X>
     where
         Self: 'b,
     {
@@ -233,7 +233,7 @@
     /// Evaluates `f` on a reference to self.
     ///
     /// Default implementation uses [`Self::cow`]. Consumes the input.
-    fn eval<'b, R>(self, f: impl FnOnce(&D::OwnedInstance) -> R) -> R
+    fn eval<'b, R>(self, f: impl FnOnce(&X) -> R) -> R
     where
         X: 'b,
         Self: 'b,
@@ -245,11 +245,7 @@
     /// Evaluates `f` or `g` depending on whether a reference or owned value is available.
     ///
     /// Default implementation uses [`Self::cow`]. Consumes the input.
-    fn either<'b, R>(
-        self,
-        f: impl FnOnce(D::OwnedInstance) -> R,
-        g: impl FnOnce(&D::OwnedInstance) -> R,
-    ) -> R
+    fn either<'b, R>(self, f: impl FnOnce(X) -> R, g: impl FnOnce(&X) -> R) -> R
     where
         Self: 'b,
     {