diff --git a/sync/optimistic.md b/sync/optimistic.md
index b59c5b99b..cf9bc2d54 100644
--- a/sync/optimistic.md
+++ b/sync/optimistic.md
@@ -220,8 +220,14 @@ Do not apply the existing condition:
 
 Instead, apply the new condition:
 
-- [REJECT] The block's parent (defined by block.parent_root) passes validation,
-	*and* `block.parent root not in optimistic_roots`.
+- [IGNORE] The block's parent (defined by block.parent_root) passes validation
+	except the block.body.execution_payload was deemed INVALID.
+- [REJECT] The block's parent (defined by block.parent_root) passes all
+    validation, excluding verification of the block.body.execution_payload.
+
+The effect of these modifications is that invalid payloads may be propagated
+across the network, but only when contained inside a block that is valid in *all
+other aspects*.
 
 #### Other Topics