I believe you are right D. There is nothing in the text files anyway. Unless it is at the code level there is no way for this to happen. Given the typical level of memory of the ai, (none) I think it is unlikely that they would modify their behavior based on anything like this.
What SJ probably perceived as this was either,
a. The AI already had minesweepers, but did not direct them to his space until it encountered a minefield.
or
2. A sheer coinkydink that the minesweepers appeard shortly after he started using mines. It would stand to reason that the ai and the player would research mines in
roughly the same time period.
or
d. SJ has a vivid imagination.
Geo