The point is that there is no such thing as a perfect arbiter of truth. I may trust a friend with whom I have a close personal relationship to always tell me the truth, but it seems foolish to place that kind of trust in a corporation full of people you don't know.
In the end, we're back to just not filtering information at all, but instead leaving it up to each individual to decide what's true and which isn't. This also clearly has not worked. Maybe this problem is just not solvable.
But that’s not truth either. While gaining a 20/20 truth picture is hard, it’s not impossible to get a picture that’s accurate enough.
Lots of information can be lock-stepped into a picture that gives enough clarity. A combination of experts, reports and documentation, high quality sources, context awareness, and people I know around the globe gives me a good enough picture.
Also the message that there is no such thing as truth is exactly what disinformation strategists want to amplify.
Yes it’s worrying, but not unsolvable.
Should DDG take into account what is and isn't fact-checked? Absolutely, and if DDG gets better at this, their users will benefit.
Truth is "not subjective" in the sense that force of will can't change the answer to even very fraught questions like "what programming paradigm works best in situation X" or "which running back would do best on team X in superbowl Y".
But one's judgement on the truth of complex question depends on one's opinions on the meaning of various terms, reliability of various individuals, the dynamics of human psychology, etc. This overall situation results in people's opinions being hard to compare and "truth is subjective" is often shorthand for this, although it would be nicer to have a different word.
Truth gets you about 1% of the way towards returning "good information". What are the ideal search results for "orange"?
Orange is also the name of a town in some places, and a county in others. But I think you need more search terms in order to disambiguate. The search engine can't read minds, after all.
My point is, there's no objective way to determine what good search results are. There are thousands of different objective measurements which people combine in subjective ways to create a subjective algorithm.