Gricean accounts of irony and problems that arise

Irony is usually carried out by saying the opposite of what the speaker means,and is,defined by Grice,through flouting one of the principles of cooperative principles-the maxim of quality ( do not say what believe to be false) . While,by studying lines from the script of "Friends"can it be demonstrated what Sperber and Wilson brought about concerning the exceptions Gricean account can not explain.