William
"What I am still hung up about is what defines potentially knowable from that which is 'nonsense.'"
It is not potentially knowable vrs nonsense, but potentially knowable vrs not knowable. Indeed what is knowable might be nonsense, in the sense that it is only a particular form of existence, as manifest to us, and 'really' what 'actually exists' is something completely different. This is a possibility, but it is of the not knowable, because, even if it exists, it is not manifest to us. Remember, we are existing in what must be regarded as an existentially closed system. Whether it is or not we can never know, because if A there is always the possibility of not-A.
Now, within knowable, ie existence as manifest to us, we can generate knowledge thereof which is either objective or subjective (ie nonsense), that is it either corresponds with what was potentially knowable (physical existence) or it does not.
Change is an form of physical alteration. How one discerns what constitutes a degree of change in respect of any given physical characteristic is another matter. Time is concerned with the turnover rate, ie the rate of change, of existent states (ie the reality at that time).
"The crux of my unwillingness to comply with your definition is that what is knowable seems to lay in the hand of the human made definition of "physical."
No we (or indeed any sentient organism) does not 'create' it in any sense, we receive it, which is a physical process. The fact that this means there is the possibility of an alternative, ie something outwith this process, is irrelevant, because we cannot know it. In other words, there comes a point where we have, scientifically, to accept that what is, is what is. We cannot transcend our own existence. And that is one of the major problems at the moment, under the guise of hypothesis assertions which transcend what is knowable are being put forward as potentially knowable.
Paul
PS: I am all to aware I have 'too many' knows (or derivatives thereof)but have yet to come up with a better label. The alternative is around aware.