It's a feeling, a sentiment, a some thing based mostly on illusion instead of an item of the intellect whatsoever." Nobody has any illusions about successful the war → Personne ne se fait aucune illusion sur l'problem favorable de la guerre. Octave Illusion - Learned by Diana Deutsch in https://illusionofkundunmuonline11098.life3dblog.com/34589847/the-greatest-guide-to-illusion-of-kundun-mu-online