Would Lawrence R. [sic] Krauss "recognize a miracle if one sat down and bit him on the ankle"? Reader Nathan Post wondered as much in his letter published Thursday in response to Krauss' July 8 Op-Ed article on miracles and the canonization of Pope John Paul II.

Post also wrote:

"Noting the dearth of miracles reported at Lourdes, France, Lawrence M. Krauss appears to make several assumptions. In a nutshell, he is saying that the number of miracles reported at Lourdes and recognized by the Roman Catholic Church as legitimate is solid evidence — almost proof — that miracles do not occur.

"One thing we do know is that if a single miracle occurred at Lourdes, Krauss would be proved wrong.

"Another assumption Krauss appears to be making is that God is some kind of spiritual gum machine: You put something in and something comes out. If true, that would betray an incredible ignorance of the church or its thinking on the subject."

Lawrence R. [sicKrauss responds:

It is correct that if a single miracle occurred at Lourdes, or anywhere else, I would be proved wrong. However, a miracle is something that cannot, by any stretch of the imagination, be attributed to natural causes.