Well, if you observe two black holes moving towards each other, you might conclude that they "will" collide, But at the time when you made this observation thes

Well, if you observe two black holes moving towards each other, you might conclude that they "will" collide, But at the time when you made this observation these black holes have already collided, you just have not observed that. It's like using future tense. "I will go to work tomorrow", event though you don't know for sure if you will go to work tomorrow.