A method for dynamically discriminating a program code patch update after merging a patch file into unmodified source code for dynamic review. The method includes providing a graphical user interface (GUI) to enable a user to merge a source code patch file into an existing, pre-modified version of source code to generate a variant form of the existing, pre-modified source code and binary artifacts, via the GUI, presenting a display image highlighting differences between existing, pre-modified source code and the variant form after merging the source code patch file into the existing, pre-modified source code, via the GUI, presenting the user with an option of debugging the existing, pre-modified version of the source code, the GUI presenting linked views highlighting the existing, pre-modified version of the source code with the variant form of the source code, in parallel, debugging the variant form of the source code, the GUI presenting linked views highlighting the existing, pre-modified version with the variant form of the source code, in parallel and debugging both the existing, pre-modified version of the source code and the variant form of the source code, in parallel, while stepping through the existing, pre-modified and variant forms of the source code synchronously, while the GUI presents the linked views.