Possibly a dumb question but: how do I tell whether two core mods are conflicting or not? I made a pretty minor core mod to the Conversation class just to see if I could do it, and I think it's not conflicting with ErrorTrap (the only other core mod I use) since I still get "Error Trap recorded: x" notifications on world load and the changes made by my core mod also appear to be working fine. But I'm not really sure?

If you're not overriding the same DLL as ET then it's not conflicting (scriptcore).

Cool! I'm only overriding Sims3GameplaySystems, so should be fine - thank you!