Charlotte and Daniel

Very Clear. Daniel has just seen Charlotte Die. Obviously Daniel knows how to travel through time, because he is the same age working for Dharma building the Orchid as he is in present day. He loves Charlotte, so he goes back to her as a girl at Dharma to tell her not to come back to island, or else she'll die (which has just happened). This proves those who believe fate, or not changing what will happen.

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