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+SYNOPSIS
+	valid_query_snoop(object ob)
+
+DESCRIPTION
+	Should return 1 if previous_object() (the one that called the
+	efun query_snoop()) is allowed to query wether ob is being
+	snooped, 0 if not.
+
+	The master object is always allowed to use query_snoop().
+
+SEE ALSO
+	valid_snoop(M), query_snoop(E), snoop(E)