Most have heard the question, “How do I know reality is real or whether or not I’m just a brain in a vat?” Some think that if we can’t tell, then we don’t have any way to know what’s true and what isn’t. But for any question that cannot be answered using evidence or some other means of falsification and validation, the answer either way doesn’t actually matter.
If we must merely suppose things like reality or God or regularity and uniformity in nature or the existence of other minds, then we are equally merely supposing we ought to act one way versus another; it’s artificial.
It turns out that supposing reality is really real or that I’m a brain in a vat doesn’t at all effect my behavior either way, as long as I cannot discover what the case actually is. The same is true with the existence of God and so on. In that case, these “cornerstone positions” are only so-called. That’s for the fact that the reliability of how I go about justifying my experience only hinges on how well my means and methods help me come to describe my experiences, whatever world that may be; reality or vat. Since I’m able to experience, my relation to whatever world I may be in is what matters rather than knowing what lies outside my ability to know. Warrant from these propositions is drawn from the functional role between myself and my surroundings, even if fictive. That role is simply coming to know how to properly interact within an environment.
Therefore, regarding reality, brains, and vats, warrant hinges on justified beliefs, beliefs entail to action, and justification can only ever be vindicated; meaning that there is a payoff when acting one way versus another.
In other words, is what I’m thinking about things the way those things seem to be, because it actually matters.
For all such category of beliefs for which there can be no answer through reasoning or evidence, their import is exactly tied to the fact that they are not truth-bearing propositions. There may actually be a case for reality, vats, deity, other minds and so on, but they have literally no meaning to our human existence except the meaning we ascribe to them.
That’s for the very fact that we can’t know if they actually matter at all.
Just a thought.