There was once a professor of law who said to his students,

There was once a professor of law who said to his students, "When you
are fighting a case, if you have facts on your side hammer them into the
jury, and if you have the law on your side hammer it into the judge."
"But if you have neither the facts nor the law?" asked one of his
listeners. "Then hammer the hell into the table, answered the
professor."
--W Somerset Maugham, Notebooks