And if now you are in single engine, so only TA activated and for some reason a lost plane come to you, what you will do ? And what if you are in the cloud?
I got this in the SIM, at one point you will have to take a decision ... We be been told to not wait last moment and do correction depending of what other traffic do (if he is same level, to climb or descent, if he is descending towards you, to turn, ...)
Like many time in aviation, the book don t have all answer and sometimes the answer is not good, not wrong, only grey