For example, in TNG's "Yesterday's Enterprise," it depicted the original timeline where the Federation was at war with the Klingons; Picard's decision to send the Enterprise-C back in time to save a Klingon outpost created the alternate timeline that we see in every other TNG episode, where Worf serves in Starfleet and the Klingons are allies.
That
is the logic of it, isn't it? Not too many people seem to notice this.
Good analysis generally.
No, it depicted the original timeline being the timeline where the Klingons are at peace with the Federation, and time travel event of the Enterprise-C coming to the future at a critical moment CHANGING that timeline into a timeline where the Federation and Klingons are at war with one another. They then send the Enterprise-C back in time to COMPLETE what it originally was going to do, which CHANGED the timeline BACK to its original peaceful self.
It however, did NOT create a parallel universe.
That's why your quarters, and corridors are brightly lit. You do not shine a bright light in your eyes that hurts your eyes, and blinds you as you try to target an attacking ship... and oops, your blown to bits.
no the rift was created in both timelines it was picard's an yar's choice to or send the ship back, In both timelines the ship was missing/presumed destroyed, or actually destroyed. The only thing that changed was the circumstances around that outcome, which caused a ripple effect which moved everyone into a new branch of the multi-verse.
No, in ONE timeline, the altered one, the Enterprise-C is MISSING, it seemingly disappeared; which caused a Klingon outpost to be destroyed, and there be NO witnesses to the Enterprise-C attempting to help the Klingon outpost. Thus the Klingons accusations and outrage that the dishonorable Federation went back on their word and did not help, which eventually led to war.
In the original timeline, the Enterprise-C is DESTROYED, VISIBLY and VERY PUBLICLY. The Klingons witnessed their sacrifice, buying enough time for the outpost to either be saved or some Klingons to flee, or whatever, but the information on the actions of the Enterprise-C reached the Klingons. A Federation ship took on bad odds and sacrificed themselves to help the Klingons; showing the Federation's honor, and thus strengthening their ties.
These are two different timelines, that existed in the same quantum reality, created by time travel.
Guinan could even sense it: the time line, was WRONG, it had CHANGED, and it was best to put it back the way it should have been.
Whether or not sending Yar back through time along with the Enterprise-C created another third time line, that only produced any minor changes in the Romulan Star Empire until Sela makes herself known, is debatable.
At this point it really gets into the nitty gritty of causality, and according to a Voyager episode the cause of something, can indeed lie in the future of the effect. As such, there might never have been a timeline where a future Yar did not arrive in the past with the Enterprise-C.
More to the point Berman and Braga are no longer in charge of Trek so the rules change as we now have a new Man in Charge, just like when a new manager takes over a business he may make changes to policy, Abrams, Orci and Kurtzman are the new keepers of Trek so we have to abide by their rules, not pigeon hole them into what came before from a man who forgot what Trek was about.
No, actually. What a creator says doesn't matter. Only what happens in the stories told is what matters.