diff --git a/britney2/excuse.py b/britney2/excuse.py
index b6e0026..01ab72a 100644
--- a/britney2/excuse.py
+++ b/britney2/excuse.py
@@ -156,6 +156,7 @@ class Excuse(object):
         self.hints = []
         self.forced = False
         self._policy_verdict = PolicyVerdict.REJECTED_PERMANENTLY
+        self.invalidated_externally = False
 
         self.all_deps = []
         self.break_deps = []
@@ -219,6 +220,29 @@ class Excuse(object):
             value = PolicyVerdict.PASS_HINTED
         self._policy_verdict = value
 
+    @property
+    def tentative_policy_verdict(self):
+        """If we've not finished running all of the policies, we can find out
+        what all of the policies that have run so far said."""
+        all_verdicts = {
+            info["verdict"]
+            if isinstance(info["verdict"], PolicyVerdict)
+            else PolicyVerdict[info["verdict"]]
+            for info in self.policy_info.values()
+        }
+
+        return max(all_verdicts)
+
+    def invalidate_externally(self, verdict):
+        """A policy might want to invalidate an excuse other than the one it
+        is currently looking at, e.g. if it later learns of a fact that it
+        didn't know when it was processing the first excuse.
+
+        We need to know, so that we can remove this excuse from the list of
+        actionable excuses."""
+        self.policy_verdict = verdict
+        self.invalidated_externally = True
+
     def set_vers(self, tver, uver):
         """Set the versions of the item from target and source suite"""
         if tver and uver:
diff --git a/britney2/excusefinder.py b/britney2/excusefinder.py
index 31ccdf4..ca6702d 100644
--- a/britney2/excusefinder.py
+++ b/britney2/excusefinder.py
@@ -520,6 +520,9 @@ class ExcuseFinder(object):
                         if should_upgrade_srcarch(item):
                             actionable_items_add(item)
 
+        # If anything was discarded by a different excuse, it's not actionable any more
+        actionable_items = {item for item in actionable_items if not self.excuses[item.name].invalidated_externally}
+
         # process the `remove' hints, if the given package is not yet in actionable_items
         for hint in self.hints['remove']:
             src = hint.package