I only recently learned that you can hack nodes simultaneously and have yet to test this out properly. 

Before you are detected and the countdown begins, does hacking two or more nodes simultaneously stack their detection chances? E.g. If I hack two nodes that have a 45% detection chance at the same time:

* Does that bump it up to a near-certain 90%?
* Does it increase it by some other amount to make it more likely but not so difficult?
* Does it remain at the highest individual rating (45% here)?

It would make pre-detection hacking necessarily slower and more careful if they do stack...