If I try to merge branches `a` and `b`, and branch `a` edited file `foo` while branch `b` deleted it, we don't allow resolving the conflicts in the UI. We could, we just need to figure out a way to display this. Here's an example of what the CLI does: ```bash $ git merge conflict-start CONFLICT (modify/delete): files/ruby/version_info.rb deleted in conflict-start and modified in HEAD. Version HEAD of files/ruby/version_info.rb left in tree. Automatic merge failed; fix conflicts and then commit the result. $ git status On branch conflict-missing-side You have unmerged paths. (fix conflicts and run "git commit") Changes to be committed: modified: CHANGELOG modified: files/images/logo-white.png modified: files/markdown/ruby-style-guide.md modified: files/ruby/popen.rb modified: files/ruby/regex.rb Unmerged paths: (use "git add/rm <file>..." as appropriate to mark resolution) deleted by them: files/ruby/version_info.rb ``` In this example, `files/ruby/version_info.rb` has the _content_ from the branch which edited it, but isn't in the index because the other side of the merge deleted it.