This is called perspectivism, and an interpreter of postmodernism describes the practical outcome of it.
We have lost the ‘real world’ and the ‘apparent world,’ he [Nietzsche] thought, and it follows from this eerie situation that there are no facts, only interpretations. With that breathtaking claim we broach the doctrine that Nietzsche called ‘perspectivism.’ It is a shorthand for a group of different doctrines – that truth is perspectival, that logic is, that knowledge is, and so on … There is no absolute, Nietzsche declared: being is always becoming and ‘being human’ is fluid rather than fixed.