What is the Idea of 'Post-truth' and its Philosophical Significance?
Uncertainty exists in relation to 'established truth', but that truth is not absolute even if people think that it is. For example, many people framed understanding in relation to the Newtonian- Cartesian model and quantum physics brought a paradigm shift which affected science so much. Of course, paradigm shifts are rare and whether there will ever be another is unknown.
Most shifts are about small ones and the issues around Covid_19 are based on general understanding of immunology. Personally, I had the vaccine but I know many who didn't because they were afraid of the risks. I also remember when I was working in mental health nursing, having a flu jab was recommended but so many people chose not to, based on fear.
Fear is generated through lack of certainty, and even questioning of authorised knowledge occurs a lot, including medicine as a whole, as well as political leaders. There is a lot of uncertainty and it may be due to an overload of information, especially on the internet. People can go to extremes of believing almost anything on the internet, or to the other of not trusting expert sources.
The varying degrees of depth of knowledge and ideas, ranging from science, academic sources to the more informal ideas of the media. In some ways, human beings, with the insights of science, and being able to access so much information from the past have so much to access for finding 'truth' in the clearest possible way. Nevertheless, sifting through this, can be an arduous task and it may need philosophers to facilitate putting it all together in the attempt to avoid so much confusion. Apart from post-truth which may be deliberate twisting of ideas and knowledge, the task may be to give more clarity of 'truth' in the aftermath of postmodernism and the way it opened up cultural relativism.