User blog comment:Master Sima Yi/Assassinews 12-05-'15 — Assassin's Creed: Syndicate has been revealed!/@comment-24760042-20150528165943/@comment-89.216.21.131-20150529083521

Still, it gives a feeling that you have failed that mission in some way. Also, you need them for 100% completion. There are good things and bad things when it comes to optional objectives, so I'm not really sure how I feel about them, whether they should be in the game or not.