diff --git a/inst/include/pc/symdync.hpp b/inst/include/pc/symdync.hpp
index 1971f55..8671094 100644
--- a/inst/include/pc/symdync.hpp
+++ b/inst/include/pc/symdync.hpp
@@ -577,12 +577,20 @@ namespace symdync
             /* --- strength --- */
             double strength = 0.0;
             if (causality_exit)
-            {
+            {   
+                // Evaluates the predictive power of x over y (x predicts y)
                 strength = weighted
                     ? std::erf(
                         norm_ignore_nan(pred_SMy[t]) /
                         (norm_ignore_nan(SMx[t]) + 1e-6))
                     : 1.0;
+                
+                // // Evaluates the cross-mapping fidelity from x to y (x xmap y)
+                // strength = weighted
+                //     ? std::erf(
+                //         norm_ignore_nan(pred_SMy[t]) /
+                //         (norm_ignore_nan(SMy[t]) + 1e-6))
+                //     : 1.0;                    
             }
 
             /* --- index lookup --- */