One of my players is interested in using Arcane Eye and Fireball in conjunction. From looking at this thread here: Area spells and line of sight, it seems that if a player cannot SEE the target, then the Fireball will explode on whichever obstruction is in its way. However, that's an AND condition, specifically.
So, what happens if a Wizard uses Arcane Eye to peer at the other side of a solid wall. Can they cast Fireball on that spot?
RAW, they can. My original argument was that RAI, it can't, since the Fireball's 'streak of light' hits a solid obstruction and explodes. However, the PHB does explicitly say 'can see' rather than using wording such as having a line of sight or an unobstructed path.