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Originally Posted by karuroso

Something is strange here or i'm not getting it right, Okabe was able to maintain his memory over the time line change but he seemed to not remember about saying the numbers to Ruka earlier, shouldn't he remember if he's able to maintain his memories over a time line jump?

Spoiler:

I think anything that he did in the past before he set the time machine is something he won't remember. For him, all that happened was everything suddenly changed around him(IE, the lab members don't remember anything, the Dr. Pepper.)