Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
Vesemir told Geralt that Yennefer had set up her trusty megascope as soon as she arrived at Kaer Morhen, but could not get it to function for the life of her. This news greatly troubled the witcher. If Yennefer was planning to use her megascope, that meant a conversation with other sorceresses was in the works - and that in turn meant scheming, politics and other things Geralt truly could not stand.
