All reality is only seen through the lens of human interpretation. Yes, measuring the speed of an object may seem as if it is outside the realm of human interpretation, but it is not - because the observer is going to be human. Accordingly, there is no objectivity that can escape the limits of human interpretation. When we speak of objectivity, we are assuming this will be seen through human eyes.
If a tree falls in the forrest and nobody is around to witness it, it still falls and produces sound waves. If you walk naked into a roaring forrest fire, you will get burned. That is objective and no matter what your subjective opinion / concensus is, it will not change the fact.
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