Well, I think you're right about the first part. The grandfather paradox or something. But remember the alternate reality theory. That every choice we make changes us. So there is an alternate reality for every choice - from committing suicide to what kind of coffee to buy - and the differences are at different magnitudes. The future sends a message to the past to decide NOT to go to the Ashen(?) and therefore it should create a split and there would be two alternate realities. One that they all died but sent a message to their past - now theoretically a completely different reality because they made a choice that the future didn't make. I overthink everything too and I was really thinking this over. What do you mean suspension of disbelief? If you lose THATE then wouldn't you be in a suspension of belief lol? But if you travel to the past and kill yourself, I guess you could say one reality is "dead" but the other reality is "alive". Since affecting timelines could easily create a tangent, a chain reaction, I suppose you would "create" an infinite amount of alternate realities. Doesn't make sense considered how the reality "transporter" has them all logged and Window of Opportunity would THEORETICALLY then have created almost a hundred different realities lol looping back on it self.