Strickland33
Well-known member
Your usage of the word "presupposition" is incorrect here. A presupposition is a logical proposition for which there is no proof of any kind. Rationalist thought can provide sufficient proof to turn a presupposition into a proposition, even if you personally don't accept that method of proof because it isn't empirical.
To answer your question, I have, through reason and contemplation, arrived at the conclusion that the material world is not all that is on a number of fronts. For example, I have, through reason and contemplation, concluded that it is more likely than not that the material universe was created by an external force. In my humble estimation, believing either that the universe is eternal or that the universe just popped into existence without an external force does not accord with what we know about science. I can't detect the force that created the universe with my senses, so I conclude that either we just haven't found the force or, more likely, that the force is not a material thing.
As another example, I have, through reason and contemplation, come to the view that there are certain ethical principles that are uniformly true. There is, in my view, simply too much homogeneity between cultural mores for there to not be an absolute right and wrong undergirding those mores. I think this ethical truth is no less "real" than things despite the fact it cannot be detected with my senses. Further, I think that the very concept of ethical rules implies the existence of an ethical rule giver. Again, I cannot detect this rule giver with my senses, so I conclude that it is most likely that the rule giver is not a material thing.
There are many other examples, but those are the first two that come to mind.
Why is it more likely that the force is a material thing? Given the size and scale of the universe (and our current technological capacity), I don't see how rationalist thought as you have described it leads to the conclusion that you have made.