Update specs/jsonschema-core.md

Co-authored-by: Greg Dennis <[email protected]>

Author: jdesrosiers

specs/jsonschema-core.md

@@ -1206,9 +1206,9 @@ each resource is a separate document connected with [schema
 references](#referenced), or is structured as a single document with one or more
 schema resources embedded as subschemas.
 
-Since IRIs with JSON Pointer fragments relative to the parent schema
-resource's IRI cease to be valid when the embedded schema is moved to a separate
-document and referenced, applications and schemas SHOULD NOT use such IRIs to
+Since IRIs with JSON Pointer fragments are relative to the parent schema
+resource's IRI, they cease to be valid when the embedded schema is moved to a separate
+document and referenced. Because of this, applications and schemas SHOULD NOT use such IRIs to
 identify embedded schema resources or locations within them.
 
 Consider the following schema document that contains another schema resource