I'm familiar with idealism and I definitely got the sense that you were coming from that perspective. As you might have guessed, I'm a naturalist, and probably also a materialist, because I think naturalism most closely comports with what we understand about how the universe works. While idealism is interesting to read about, I have yet to meet anyone that could provide evidence for the fact that it is actually correct and naturalism is wrong, so that's why I was asking. I'm personally not that interested in philosophical concepts that have no evidence or application in the real world.
I'm also not aware of evidence for any "truths" that are themselves inherent to any abstractions we use as a species. For example, I can write an equation like so:
x + 7 = 10
I can solve for X and find that it is 3, and verify that my answer is correct by checking it against the original equation. I can do all of that using the abstractions we've developed and nothing more. But none of these truths are actually inherent to the abstraction of numbers; I could just have easily put seven apples in front of me, and added apples to another pile until I arrived at a total of 10 to find my answer.
Could you give me an example of an abstraction which contains a truth that does not ultimately derive from the material, as in the example above?