Paul's post just above reminds me of a fine moment in one of F R Leavis's Cambridge lectures in 1954, where he said of a passage in some work he was analysing, "Note that very interesting ambiguity ~~ of course there are far more than 7 types of ambiguity: he was just being modest."

~Michael~

Any who read English in the middle of last century, in those far-off days of pre-Structuralist ingenuousness and the New Criticism, before the likes of Barthes & Derrida had reared their hideous heads and spoilt everybody's innocent fun, should see the point of this anecdote. Any others who don't get it, but might conceivably be interested, will find helpful info in the wiki entries on F R Leavis, and on Seven Types Of Ambiguity (William Empson).