Chris, I’ve experienced this too. I think writing it down has helped me and others visualize what we’re saying. These words might be used in different ways by different people; that’s fine, as long as we can define them we can then discuss them more accurately and with less confusion.
For instance,
An objective truth is a statement that accurately represents reality. For instance, “2+2=4” or “children are younger than their mothers.”
A subjective truth is a belief that a particular person believes. For instance, “Vanilla ice cream is the best ice cream” or “my mom is the best mom.”
Some people want to say, “All of my beliefs are subjectively true.”
Ok, I can roll with that. It’s a little confusing, but I get the sense of it. My beliefs are my beliefs, and I need to acknowledge that.
The question is, given that all of your beliefs are subjectively true, are some of them also objectively true?
For instance, it is my subjective truth that I believe 2+2=4. However, even though I am an individual person who holds that belief, isn’t it also the case that it is objectively true that 2+2=4?
If someone will go with this, then the point is that part of our discipleship is to line up our subjective beliefs, in the way we’re using this term, with as many important objective truths as possible, and to avoid believing as many important objective falsehoods as possible.
For instance, it is good if subjectively, I believe the objective truth, “God in Christ died for my sins.”
Sometimes, however, someone says, no, my beliefs are only subjective, therefore they cannot be objective. In this case, I feel compassion because I think they’re very confused. The problem here is that this is a radical skepticism.
Let’s call this the “Exclusively Subjective Belief Hypothesis” (ESBH for short). The Exclusively Subjective Belief Hypothesis states, “A person’s beliefs are exclusively subjective; none of them are objectively true.”
Let’s ask, “Is the ESBH objectively true?”
Well, if I believe it to be true, then it is only subjectively true, and therefore, by definition, not objectively true. So the ESBH is not a statement that conforms to reality. Therefore, if I believe the ESBH, it is objectively false.
However, if no one believes the ESBH to be true, then it might be an objectively true statement. However, no one could know it to be true, because as soon as someone believed it to be true, it would be an objectively false statement.
So, the rational approach is for no one, upon considering the ESBH, to think it is true.
This is all a very casual way of putting it. I welcome anyone helping me to sharpen my thinking here.