Items that are not recognized, because the corresponding ciphers are not compiled in or because they are mistyped, are simply ignored. Failure is only flagged if no ciphers could be collected at all. It should be noted, that inclusion of a cipher to be used into the list is a necessary condition. On the client side, the inclusion into the list is also sufficient. On the server side, additional restrictions apply.
All ciphers have additional requirements.
ADH ciphers don't need a certificate, but DH-parameters must have been set. All other ciphers need a corresponding certificate and key. A RSA cipher can only be chosen, when a RSA certificate is available. A DSA cipher can only be chosen, when a DSA certificate is available.