答非所问 [- fēi suǒ wèn]give an irrelevant answer; an answer wide of [off] the mark; answer beyond the question; answer sb. ignoring his question; answer what is not asked; The answer evades the question.; The answer is beside the question.：
•¶ 那老僧既聋且昏， 又齿落舌钝， 所答非所问。 The man proved to be deaf as well as dim-witted, for his mumbled answers were quite irrelevant.