If you knew what events would unfold, then you could change the action, which intern would change course. Thus timelines can be altered. However, this creates a time paradox where any future events could potentially snowball into causing more catastrophic changes. Maybe small or slow at first but 50 to 100 years from now could be massive in respect. John is correct in his explanation about time in that if the white hats had the ability to peer into the future, using Looking Glass technology, then they would need to find the course that would produce best results, and unfortunately, if there are casualties along the way, they cannot do anything about it because it can cause a ripple that would eventually lead into a tsunami of catastrophic consequences. Many.Ufologists have said that project looking glass was the attempt to create a Time Machine, which failed, however, in its place, they created the means to look into the future based on probabilities of reality.