Lol, this is why I don’t do timey wimey stuff, my head always gets hurt trying to figure it out.
Me and you, especially bc this is ouat and they are not following tradicional time travel, where you cannot let others see you, also according to some people here at the chat there are reports of emma, hook, snow and charming at a bonfire, if this is true they we will see each other, so beside seing rumple, they may also see other persons when they are not supposed, even hook seing himself, so that means they will remember this on present SB, that they saw them in the past.
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"I offended you with my opinion? Ha, you should hear the ones I keep to myself".