If we had an authoritative way of determining truth, then we wouldn't have the problem of curating material to train an LLM on. So no, I don't think it's a separate problem.

Again, the word "bias" and its definition exists outside the comparatively narrow concern of training LLMs.

So? The smaller problem is solved by solving the larger problem. So, not separate problems.

You seem to have a larger point or position or something that you're hinting at. Would you stop being vague, and actually state what's on your mind?

Literally the only thing I've been addressing is the proper usage of the word bias, there is nothing implied, hidden or hinted at.

You seem determined to make the definition of the word serve some AI-related concern.