But if something is determined, then nothing would be able to influence it not to be. Such as, "Montmorency will stay in home all day" is your fate, but if I put an icecream van out inside with free icecream, you may exit it, thus you invalidate the determined.
Husar is correct. A determined scenario is simply the condensate of the miasma of influences. As always, the answer lies in our ignorance.

Quote Originally Posted by Papewaio
If Fate exists it is because of an outside force willfully acting on the object.
Fate is usually considered in terms of an intentional force, but this is just an artifact of how we view ourselves. If we're going to entertain a notion of states of matter at one time exerting 'new' force on states of a prior time, then we might well imagine a situation in which the heat-death of our sun causes AskthePizzaGuy to be elected President of the United States in 2028. But that's a meaningless figment.

There are a few hacks who like to play around with the philosophy of Fate, but they always ignore both its uselessness and its obscurantism.

One of the many demerits against contemporary quantum theory is that there is a significant school within the discipline that argues for a role of Fate not dissimilar from what was in my example above.