Last question for today. InIm spells are used to detect an "image" (Guidelines, ArM5, p. 145) or "illusions" (Discern the Images of Truth andf Falsehood, ArM5, p. 144). So, do they allow you to see a Magus having cast on himself a Veil of Invisibility which, like any PeIm spell, is cast with a view to "destroying (...) images" (Guidelines, ArM5, p. 146)?
In other words, can an image, once destroyed, still be detected?
I had thought the same thing but now I think that destroying the species that is emitted by an object is not making an image to be detected. Read up on the sensing and making of illusions in the HoH:S pages 63-66