 What makes the Monty Hall Problem interesting is that it is not a paradox. There has always been expert consensus on its solution. Yet it has many of the psychological and sociological features of a paradox. The Monty Hall Problem is merely a cognitive illusion. Paradox status is also withheld by those who find only irony in self-defeating predictions and only an embarrassment in the “knowability paradox” (discussed below). Calling a problem a ‘paradox’ tends to quarantine it from the rest of our inquiries. Those who wish to rely on the surprising result will therefore deny that there is any paradox. At most, they concede there was a paradox. Dead paradoxes are benign fertilizer for the tree of knowledge.