甲。在公众论坛,没有对面打交道,那就不作直接回应 -- 雄辩是银,沉默是金!(辨赢了您也挣不着啥,所谓“道不同则不相与谋,道相同则朋比为奸”)。
乙。在公众场合,有对面交道,just say "I don't know what you are talking about", then walk away. (if he chases? call police).
丙。在工作场合,是同事? -- All these: "I see"; "Really"; "Hun.."; "Perhaps you're right, I havn't thought about it"; "I would like to agree with you, although I know nothing about it"; "Gotta run, job calling"....................... All these mean the same thing: "Not with You".