Hunter Zolomon's Jay Garrick Time Remnant Explained! Reverse Flash Time Remnants Explained! [VIDEO]

I think a better way of describing it would have been like this:

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That is the timeline a single uninterrupted line.

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That dot is when Eobard travels back in time and learns the Flash's time period.

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Now there are two dots, the dot on the right is his trip when he learns the time period and the dot on the right is the one where he kills Barry's mother and gets stranded.

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Now there is a factorial, the squiggly lines in between the two dots are the time altered by Eobard Thawne and the factorial in the middle is when Eddie commits suicide and aborts Eobard. Notice how I removed the future after the third dot, that's because Eobard Thawne's future does not exist anymore, it has gotten wiped out.

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Instead we have this, there is a new future that no longer leads into the one where Eobard was born. So what happened to the one where Eobard was born? It's gone, never happens and for all intents and purposes never will. So what is a time remnant. Vision this:

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Those two stars are the points in time when Eobard originally jumped two the past (the first and last dots). Now when the timeline hits those spots, there is no Eobard to jump back. However, the Speed Force requires the past to happen and in the past, there was an Eobard (albeit one who no longer exists in the future).

So Eobard no longer exists, but when those the timeline reaches those dots, he returns to existence merely to complete his role in the timeline. That is how the Speed Force shelters him, by bringing him back during a time he affected and then removing him when he leaves. There can be say four more dots, which will mean four more stars and each time a dot is hit, Eobard returns but then leaves.

The only thing that could transform those dots back into (~) or (-) is Eddie's resurrection which would restore Eobard's timeline.