So if I understand correctly: paradigm in M:tA is the mage's understanding of the Tellurium which dictates in which way he can affect the Tapestry in order to cast magic.
I found an example somewhere of a Verbana being unable to turn a werewolf into a garden gnome, because it doesn't fit her paradigm. Now, this is a pretty vulgar magical effect, but I can find no clear explanation of where it clashes with the Verbana philosophy.
First of all: the Paradigm is not a static thing. It can change (for instance if you gain arete, your paradigm
will slightly change to show that your character's understanding towards the world has changed).
Verbena have a weird and very naturalistic view (all-in-one) of deities (there is but one God and that's Nature). Obviously, a Verbena using magic to transform something into a garden gnome is but a travesty of the Verbena beliefs; at the very least the garden gnome is just an artificial object with no real connection to Nature, or, if you prefer, the garden gnome's connection to Nature is diminished compared to another object or matter, such as mud or rock (strongly 'natural' from the Verbena PoV).
It doesn't matter whether the effect is coincidental or vulgar - a Verbena (unless he has a weird tech-Naturalistic paradigm "after all everything is natural" kind of thing) would not be able, for instance, use a computer screen as a reflective surface for scrying, as a mage with a more technological-inclined paradigm wouldn't use pools of clear water or blood.
So, it would be fine for a verbena transforming that werewolf into mud, rock or blood, but not a garden gnome or a walkie-talkie