Doesn't this question also serve as a response to your OP? Further the OP scenario has as a proviso that no Matrix like situation is in place. This is like saying A must lead to B unless there is something that might prevent it from leading to B. Adding to this, from a scientific methodology perspective you can only talk about probabilities. As far as scientists know it is incredibly unlikely that the molecules of the male would sift their way through the wall without the wall or the man changing. However it is not impossible. Some physicists consider it possible the universe is infinite - thus radically increasing the chances of exceptional anomalies occurring. (bit of a redundant term there, but since it was such an exceptional anomaly I felt justified) There are also multiverse hypotheses out there offering other ways of having a universe, making exceptions likely in a different way.