Update docs/specification/current.md

Author: isaacvetter

docs/specification/current.md

@@ -1004,7 +1004,7 @@ CDS Services and browser-based CDS Clients will require CORS support. A secure i
 
 In the case that CDS Hooks cards are persisted, clients should take care to ensure that stale guidance does not negatively impact patient care.
 
-CDS Services can then update their guidance by returning a new set of `cards` when the service is invoked based on a different `hook`. CDS Services indicate this intend by providing multiple CDS Services with the same `id` in [discovery](#discovery). Clients are recommended to remove `cards` returned by a previous invocation with the new `cards`. 
+CDS Services can update their previously returned guidance by returning a new set of `cards` when the service is invoked based on a different `hook`. CDS Services indicate this intent by providing multiple CDS Services with the same `id` in [discovery](#discovery). Clients are recommended to remove `cards` returned by a previous invocation with the new `cards`. 
 
 *STU NOTE: We are seeking implementer feedback on how best to balance the needs of performance for implementations with the critical patient safety issues raised by the potential for stale guidance.*