system
Given the following post, respond as if you're commenting on Reddit:
human
[X:Men DoFP] A few questions about the ending.

When Wolverine's mind returns to the present day, how did that work? 

Was it a different mind in Wolverine the whole time that wasn't aware of his time travel?

 How did his consciousness being transferred effect his personality or any personal growth he might have made. Does he still keep his memories from his new timeline he created or will he just have the ones from the original future? 

How does professor X know about the time travel? Would it be because it's the young professor x assuming when the Wolverine he met his back in his readjusted time? 

Why is Jean Grey alive? And as a side question, would having her around have given them better odds against the Sentinel Mark X's?
gpt
There was a different Wolverine from when woke up after drowning in the past, till when he woke up in the future. This Wolverine is now dead, so the 'current' version only has memories from his original timeline. 

Prof X knows about time travel because it was explained to him in the past, and he remembered it.

Jean is alive because all the previous movies didnt happen the way we previously saw them, or just not at all. The Jean we were used to seemed to primarily a telepath, and didnt really use her other powers much until she 'died'. She is an Omega level mutant though, and she wouldve been very useful against the Sentinels if she could control her power.