Vulgar effect

Vulgar magic is magic that incurs paradox.

Magic becomes vulgar if it is obviously not coincidental - the less likely it is to happen in real life, the more vulgar it becomes. Magic becomes more vulgar if more Sleepers see it. NB - there were some theories that this was because the Avatars of Sleepers, although not fully conscious, take part in believing in the "real" world. This would explain the difficulties inherent in casting magic in front of larger and larger crowds - There is one Awakened mage willing something into existence, but many sleeping Avatars willing it not to exist.

Example - the classic D&D fireball spell. This is VERY vulgar magic. Mostly.

If a mage used their knowledge of the shpere of forces to throw a ball of pure flame outwards from themselves, they would be doing something that is pretty unbelieveable in real life (spontaneous combustion theorists aside). Even if there were no Sleepers to see, the amount of paradox incurred would be huge.

If, however, the mage was defending themselves in the middle of a burning gasworks, and used forces and correspondence to make a jet of flame seem to shoot out from a nearby pipe, almost no paradox would be incurred, as the effect is very believeable.

If the mage were a Son of Ether, they might carry a lightweight talisman that looked like a flamethrower but never ran out. Then they would be exercising coincidental magic, but might be hampered in their undercover work...