While giving evidence at the trial of Stephen Ward, charged with living off the immoral earnings of Keeler and Rice-Davies, the latter made a quip for which she is now best remembered. When the prosecuting counsel pointed out that Lord Astor denied an affair or having even met her, she replied, "Well, he would, wouldn't he?".
MiniTruth: Stating the bleedin' obvious
If the negative version of any statement is clearly content-free; the original statement is equally useless.