diff --git a/README.md b/README.md
index d2a573d..78db742 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,15 @@ the functions in the pyshgp list.
 
 https://erp12.github.io/pyshgp/html/core_instructions.html
 
+# Big Problem
+
+There is no easy way to determine equality of two functions in Haskell. No comparing names, no nothing.
+We coult compare applying two functions to an example state, but that would get tedious and costly quickly.
+
+The only idea floating in my head at the moment is to attach a string to the `StateFunc` Gene to
+track what the functions are. This would require a painful redefinition of the tests, but I think would be
+worth it in the grand scheme. Would mean we could also track the functions when outputting them after training.
+
 ## Tasks
 * [ ] Post minimal core of exec to haskell discourse for advice about speed optimization.
 * [x] Do test-driven development on this one.