Is Chief connecting to the Domain?

We’ve heard about a scene in the Campaign where Chief sees the ‘ghost of Cortana’ telling him the Domain is open and to head to Meridian. Now is this one of the affects having his evolution advanced has had on him? He is now able to tap into the Domain, but right now he believes them to be possible hallucinations? The Domain is reaching out to him, and he perceives it as Cortana, who he’s lost?

> 2533274840469109;1:
> We’ve heard about a scene in the Campaign where Chief sees the ‘ghost of Cortana’ telling him the Domain is open and to head to Meridian. Now is this one of the affects having his evolution advanced has had on him? He is now able to tap into the Domain, but right now he believes them to be possible hallucinations? The Domain is reaching out to him, and he perceives it as Cortana, who he’s lost?

Could you remind me what the “domain” is? Ive read the books I just don’t remember

> 2533274840469109;1:
> We’ve heard about a scene in the Campaign where Chief sees the ‘ghost of Cortana’ telling him the Domain is open and to head to Meridian. Now is this one of the affects having his evolution advanced has had on him? He is now able to tap into the Domain, but right now he believes them to be possible hallucinations? The Domain is reaching out to him, and he perceives it as Cortana, who he’s lost?

I thought the domain was destroyed when the Halo’s were activated? Thats why the didact when insane in the cryptum, he couldnt access the domain for 100,000 years!