Also we can do the whole brain in a vat thing, can we really know anything? Arguments from scepticism and solipsism do get the point across I suppose. But either we experience objective reality or are incapable of it, and if the latter is true it's irrelevant. It's rather difficult to assume nobody you interact with is conscious, but admittedly we don't know that. So for this thread we start with the belief that we can know anything at all, because if we can't we are all locked in a paradoxical existence being hypocrites for sharing ideas here.
I don't think we can know anything, but I believe in fun
. And if we can't know then we cannot argue that some deity objectively exists.
I agree with you. I personally abhor the "brain in the vat" argument. I believe that, for the most part, we should trust our senses and assume that they are giving us accurate information. I also believe that the scientific method is the best way to get good reasons for believing something is accurate.
But, there are some necessary things to point out:
1. Reality is likely more complex than our senses can sense, no matter how accurate. Imagine you have 20/20 vision. Your eyes see as perfectly as human eyes can. They are therefore accurately depicting reality... but only the reality that they are designed to see. They cannot see in the ultraviolet or the infrared. And there can be senses even more fantastic, that can sense things that we cannot imagine sensing.
This is the sort of thing I am talking about. We should rightly assume that our senses our accurate, but we shouldn't be so presumptuous as to believe that they are complete, that they are telling us everything.
2. Usually what we consider to be 'facts' are simply things that the majority of people agree upon. And it needn't even be a majority of the people of the world-- it is often simply the majority of a culture, a community, a subset of professionals, etc. These 'facts' therefore are often subject to change. It was considered a fact that the sun moved around the earth. It fit the currently available perceptions and the worldview at the time. That changed. So we see that simply labeling something a fact, even an objective fact that has external reasons for supporting it, does not necessarily make it so.
3. Things we accept as true are often things that we personally do not have any experience with. We accept that an atom is made up of 3 separate parts, the electron, the neutron, and the proton. Have you actually seen this? So, we do often accept the testimony and evidence of others as a satistisfying reason for belief.
4. Not everyone has the same experiences or abilities. This means that someone may be able to smell better than you can. This means that someone might meet a person across the globe that you will never ever hear about. Does this mean that the smell that the olfactorally gifted person is smelling doesn't really exist since you cannot confirm it? Does that person not exist, since you have never experienced him? Are you able to feel the love a mother has for her child? Does this mean that she has no good reason for believing her love exists?
Simply because something is a subjective, personal experience, something that you are not privvy to, does not make it any less real. It might make it less provable. But it doesn't make it a bad reason to believe it, for the person who has had that experience.