CaptainRyan
*written* Could a Shard refuse to "fuel" a magic user? E.g. Could Preservation have refused to "fuel" Ham's pewter? (Please, for the question, assume Preservation is whole and undamaged.)
Brandon Sanderson
*written* No, but he could have interfered.
*spoken* So, the answer is "no, he couldn't." Like, if you just had the Allomancy going, like--
CaptainRyan
They can't shut you off?
Brandon Sanderson
They can't shut you off, but they can interfere with you using it. They could do other things. But, like, the magic, it would be like saying, "I refuse to let gravity work on this person."
CaptainRyan
But couldn't a Shard-- Technically, they can control forces--
Brandon Sanderson
No, they can't, but they can interfere with it, does that make sense? ...Gravity is not gone, but this person is being interfered with and their relationship to these sorts of things.
CaptainRyan
Kind of like if I throw your pen in the air, gravity's not gone, but I've interfered with something.
Brandon Sanderson
Yes, exactly. And you can, like, twist the gravity, so it's pointing... But the laws of natures, burning is, like, a law of nature, and things like that. And they can circumvent, and they can twist, and they can bend, but the laws of nature are still the laws of nature.
CaptainRyan
They can't just cut it off?
Brandon Sanderson
Yeah.