The grand Illusion is the vain hope that the war could be the last. You can see the related link.
Ummmmm im not sure because you can only be an illusion if you live an island on your own but with wilson. Wilson then has to travel down and up lewis's and jessica's top's to feel lat home. :D
An illusion is an object that could mistake your vision for something that it isn't.
something that is not real
yes because optical is just another word for having to do with vision