Whatever you say. Apology accepted.

@Yedua, My concern was that you had said: Even with your qualification, The issue is that there is no number of act cycles which would guarantee that you would see both actors. Therefore, if the purpose is to check for collision (intersection) with a particular type of actor instance, what you proposed will not perform this reliably. I do not see this as accomplishing the same thing. In my eyes your (qualified) suggestion that the code accomplishes the same thing could be clarified, which is why I posted the previous response. You will notice that I did not say you were wrong (as you implied I did); I just added a clarification to the conversation.