Clarification suggested by Karen

shacl/index.html

@@ -1405,6 +1405,7 @@ <h2>Validation and Graphs</h2>
 						<li>A <a>node</a> validates against a <a>shape</a> if and only if
 							either it does not validate against some <a>filter</a> of the shape
 							or none of the <a>constraints</a> in the shape produce a <a>validation result</a> or a <a>failure</a> for the node.
+							(This implies that a shape without constraints can never cause validation results.)
 							Note that validation against a shape processes the shape as a <a>focus node constraint</a> only,
 							even if the shape may have <code>rdf:type</code> triples or an <a>expected type</a> that would also make them <a>property constraints</a>.
 						</li>