Quote Originally Posted by Diarmuid View Post
True seeing will indeed blow up any/all illusions...that's just what it's there for. It is the "paper" to illusion's "rock".
Although I wonder if this part:
In addition, the spell effects cannot be further enhanced with known magic, so one cannot use true seeing through a crystal ball or in conjunction with clairaudience/clairvoyance.
Means you can't use true seeing in conjunction with Detect spells.