ok I idn't know at first who exactly told them au how did they know about it .I thought that may be they just wanted to make sure.but, I was wacthing the final episode "again" the other siku , I noticed that when Ben told Jack all of wewe have to go back Jack told him "Kate is not even talking to me" . Ben told him that he can take care of that .so I remembered the sneak peak I saw .I started thinking is it possiable that he told them about Kate , so she agrees and go back with them .And I thought hujambo it's Ben he can do everything .I started to look for other explnation ,like if Claire's mother told them,but how did she know that he's not Kate's baby beside when Claire was pregnent her mother was in a comma which means she doesn't even know that her daughter was pregnent . But I also thought about Jack telling them for the same reason why Benwould tell them .
It's the only explnation I have if wewe have an other theory please tell me .
Happy new mwaka everybody

Now I know many people are thinking that Lost may end with jacks eye closing i reli like the idea of that as it viungo in with the beginning. However I think it would be good if in the last finale Jack sacrifices himself for the other survivors so that they can get off the Island au maybe just survive on the islnad. Then there is an exteme close up on his eye as he lies on the floor. John Locke (who may have appeared to have died au not, seeing as he was in the coffin) suddenly appears reflected in his eye. Locke then closes Jacks eye. Black scree. LOST. This would onyesha that these two characters are connected and also end the show!!!